Resource Economies

A resource economy is one where a large share of national income arrives as rent from something extracted rather than as return on something produced. The subject is what that does to growth, to the exchange rate, to the budget and to the state — and whether any policy instrument reliably changes the answer. It is terrestrial throughout. The economics of extraction outside Earth's gravity well is a separate subject with a separate literature and it is covered at Space Resource Economies; the one thing the two briefs agree on, that abundance is never the binding constraint because access, cost and institutions bind first, is made there and is not re-derived here.

The framing under test is a policy claim — that resource wealth can be managed into development — and it decomposes into three questions the literature answers with three different levels of confidence. Is there a curse? A robust correlation, contested identification. What is the channel? This is where the subject breaks: the channel evidence is weaker than the headline correlation, which is the opposite of the usual pattern and is the single most important structural fact about the field. Do the remedies bind? Tested three ways, with one clean compliance, one clean design and one clean failure — and the failure is the informative case.

Established Start with the replication, because everything downstream sits on what survived it. Graham Davis ran a formal replication of Sachs and Warner's resource-curse working papers and published it in the Journal of Development Studies in 2013. The 1995 working paper could not be replicated at all — the data archive is missing. The 1997 paper replicates exactly, but only after the replicator determines which countries entered each regression and corrects errors in the paper's own reported regressors: Davis catalogues an investment variable mislabelled (INV7089 for LINV7089), dependent variables misreported (GEA7089 for GEA7090), and regressor specifications inconsistent with the analysis code. The headline result then holds. It survives alternative resource-intensity measures (SNR, PXI70, LAND), extension of the sample to 1970–2010, and expanded country samples of 105–113. Davis's own word for it is “surprisingly robust”.

Established And then every proposed mechanism fails on the same data. Restricted to a consistent 91-country subsample — the countries present in all the specifications rather than a different set in each — the institutional-quality channel loses significance, the manufacturing-decline regression (Davis's 8.1) becomes insignificant, and the U-shaped trade-openness relationship (10.4) disappears. Davis's summary is that the curse is robust while the proposed causal mechanisms are “not robust to country sample”. Frontier A correlation that survives robustness checks while every channel fails them is exactly the signature you would expect if the correlation were compositional rather than causal — which is precisely what the critics claim. Established It is also fatal to the policy layer in a way that is rarely said out loud: funds, fiscal rules, transparency initiatives, local content and diversification are all interventions on channels. If you cannot identify the channel you cannot design the intervention, and you certainly cannot evaluate it.

Frontier The critics, in order of how much damage each does. Jeffrey Frankel's NBER survey is the fairest map of the terrain and is unusually candid that the underlying scatter is weak — primary-product exports against growth show only a “slightly negative correlation” — and states plainly that “resource endowments and booms are not exogenous”. A high mineral export share may record comparative disadvantage in manufactures rather than harm done by minerals. Frontier Brunnschweiler and Bulte instrument the measure and find the arrow on the conflict channel runs backwards: conflict raises resource dependence rather than dependence causing conflict. The abundance-versus-dependence distinction is the hinge of the entire critique. Frontier Alexeev and Conrad, adding regional dummies, find oil and mineral wealth have a positive effect on income per capita and — the load-bearing null — no significant interaction between oil wealth and institutional quality, which contradicts the one consensus proposition the field still holds. Frontier James supplies the cleanest compositional explanation: a declining resource sector is mechanically over-represented in a resource-dependent country's growth aggregate, and he finds little evidence that dependence hampers growth in non-resource sectors, which is where a genuine curse would have to appear. Frontier Smith uses major discoveries since 1950 in previously non-resource-rich countries as exogenous variation, in panel fixed effects and in synthetic control on individual treated countries, and finds a positive and persistent effect on GDP per capita levels, concentrated in non-OECD countries.

Established Weight the critics up, not down, and say why. None of them has a stake in the answer. They are academic economists publishing in development journals, and several are publishing results that make their own field's signature finding disappear — a career cost rather than a benefit. Established Interest running against a finding raises its weight, and this brief applies that rule symmetrically: it is also why the Norwegian state portal's account of the Norwegian state's fund is discounted below the IMF's, and why the IEA's data are used while its framing is marked.

Frontier The strongest reply to the exorcism is that the curse was never about the level. Van der Ploeg and Poelhekke argue that resource exports and rents boost growth in stable countries and make already-volatile countries more volatile, and that the statistical-artefact results themselves suffer from endogeneity and weak instruments. That is a genuine reconciliation rather than a restatement, because it converts a level effect into a conditional variance effect — testable, and it moves the policy target from diversify to stabilise. Established Frankel supplies the mechanism: oil prices are more volatile than any other mineral or agricultural commodity, because low short-run demand and supply elasticities force small quantity shocks through into large price swings. Frontier A survey of two decades of the scholarship records where the field settled — earlier macro-econometrics suffering from “endogeneity of mineral wealth measures, multicollinearity, omitted variable bias”, newer designs using discovery data and within-country variation being more credible, and the institutions result being the one most people still accept. Frontier Alexeev and Conrad's null sits directly across that last sentence and nobody has resolved the contradiction.

Frontier Dutch disease, measured rather than asserted, is messier than the textbook. The textbook chain is a boom causing real appreciation, higher government spending and labour pulled out of non-commodity tradables, and the fiscal amplifier is documented: Medas and Zakharova show government wage bills responding strongly to commodity prices lagged three years, with the trap being that wage bills cannot be cut when prices fall. Frontier Reisinezhad runs system GMM on 152 countries, 1970–2019, and reports an explicit theory–evidence gap: standard models predict long-run real depreciation with neutral or positive growth effects, and the data do not show that. In resource-rich countries booms cut manufacturing growth more than services, lowering relative sectoral output and slowing growth; in resource-poor countries booms accelerate manufacturing and decelerate services; and real appreciation is more pronounced in resource-poor countries, the opposite of the usual telling. Frontier Treat Dutch disease as a real mechanism whose sign and magnitude are conditional on the initial structure of the economy, not as a law.

Established Botswana is the standard counterexample and the paper everyone cites denies that diamonds are the explanation. Acemoglu, Johnson and Robinson record 7.7% annual per-capita growth 1965–1998, the world's highest over thirty-five years, and PPP income per capita of $5,796 by 1998, nearly four times the African average, against negative average growth for sub-Saharan Africa since 1965. Frontier Their mechanism is institutional: pre-colonial Tswana political institutions — the kgotla, an assembly of adult males in which public issues were debated — constrained elite power; light British colonial rule left them intact; and at independence mineral rights moved from tribal to national ownership, removing the object of inter-tribal conflict. Established The caveats are in the same paper and are almost always dropped. The authors record adult HIV prevalence of 25–30%, a Gini of 0.54–0.56, high unemployment and “soft authoritarian” tendencies despite electoral democracy, and they explicitly question whether the institutions can handle them. Botswana is an argument that institutions preceded the diamonds, which is close to the opposite of a management claim.

Established Then the remedy, tested three ways. Norway: the rule binds, currently, and only just. The guideline is to spend no more than the expected real return, “currently estimated to 3%”; the IMF's 2025 Article IV staff report puts the structural non-oil deficit at 2.7% of the 2024 market value of the Government Pension Fund Global for 2025 — inside the ceiling. Established The fund's own portal reports about NOK 21,300 billion at end-2025, roughly NOK 3.8 million per registered person, established 1990 with the first transfer in 1996, NOK 5,420 billion of net petroleum inflows since inception, NOK 13,457 billion of cumulative investment returns, and a net inflow of about NOK 300 billion in 2025 — withdrawals smaller than contributions. Mark that source: norskpetroleum.no is the Norwegian state's petroleum portal reporting on the Norwegian state's fund. Frontier The IMF's own recommendation is the under-quoted line and it is a criticism of the mechanism rather than of Norwegian discipline: the rule should be complemented by explicit medium-term expenditure limits, because a rule denominated in the market value of a global equity portfolio transmits equity volatility straight into the budget.

Established Chile: the rule binds because it delegates the forecast. Under the structural balance rule adopted in 2006 and later legislated, independent expert panels assess the output gap and the medium-term equilibrium copper price annually, and deficits are permitted only where output is below potential or copper below trend. Across 2003–2008 the result was a fiscal surplus of almost 9%, debt down to 4% of GDP and roughly 12% of GDP saved in the sovereign fund — which then financed the 2008–09 stimulus. The design feature worth naming is that the rule removes discretion over the number the rule is computed from, not merely over the arithmetic.

Established Nigeria: the rule did not bind, and the failure is documented in detail. The Excess Crude Account peaked near $20 billion and fell to $72 million before the pandemic — empty at precisely the moment it existed for. Roughly $70 billion that should have flowed in between 2005 and 2015 did not, through legislative reductions of the budget oil-price benchmark and under-contribution by the national oil company; net transfers over 2005–2015 were minus $3.5 billion; and withdrawals peaked in 2011, the year of Nigeria's highest oil revenues. The named mechanism is that the fund sat “within an extensive network of patronage that goes beyond the control of formal institutional structures”. Frontier The generalisation is that a stabilisation fund is not an institution; it is an account. What binds is the rule governing deposits and withdrawals and whether a body outside the finance ministry sets the reference price. Chile has that. Norway has it plus an unusual political consensus and a continuous net inflow. Nigeria had neither. Established Drained hardest in the highest-revenue year on record is not a failure of rule design. It is evidence that the rule was never the binding constraint.

Frontier The organising question is no longer whether there is a curse but what the correlation is made of, and there are at least four live answers held by serious people. They are set out separately because they imply different policies and because the disagreement is the subject. (a) Strong curse: resource wealth causes slower growth; held by the Sachs–Warner lineage and by most of the policy world; the headline correlation replicates and nothing has dislodged it. (b) Composition artefact: a declining resource sector is over-represented in the aggregate, so the growth deficit is arithmetic rather than damage; James's position, and settled by sector-decomposed growth accounting on a common sample with the resource sector removed from both sides, which nobody has published. (c) Reverse causality: conflict and weak institutions raise dependence; Brunnschweiler and Bulte's IV result, and unresolved because the weak-instrument critique cuts both ways. (d) Blessing: discoveries raise income levels durably; Smith's panel-plus-synthetic-control result, which would be settled by replication on a later discovery cohort and, more sharply, on discoveries that were not developed.

Frontier A fifth position reconciles rather than adjudicates and is currently the most useful. Van der Ploeg and Poelhekke's volatility curse predicts that resources help stable countries and hurt volatile ones, which is consistent with both the level results and their exorcism. Speculative It has never been pre-registered as the primary specification with the volatility interaction stated in advance, which is the test that would move it from reconciliation to finding. Frontier A sixth — institutions condition everything — is the field's default, has Botswana and the settler-mortality instrument behind it, and has a live contradiction sitting on it in the form of Alexeev and Conrad's null on the oil-by-institutions interaction that nobody has resolved. Speculative A seventh, the point-source versus diffuse distinction — that oil, minerals and plantations damage institutions while diffuse agriculture does not — rests on cross-country classification and would be far better tested on within-country variation across resource types inside a single federation, which the data would support and nobody has run.

Speculative The strong minority position deserves stating at full strength rather than being softened: that the resource curse never existed, and thirty years of literature is an artefact of a bad regressor. Its evidence is exactly Davis's result read one step further — every mechanism fails on a consistent sample — plus the two identification-based papers that find the opposite sign. What would settle it is a meta-analysis restricted to designs with exogenous variation, which does not exist. Speculative A competing minority runs the other way and is equally unfalsified: that resource wealth is fundamentally a political-settlement problem and the fiscal rule is downstream of who can be excluded from the rent, which makes the Nigerian patronage finding the central case and the Botswanan institutional inheritance a settlement story rather than a management story.

Frontier The live empirical question with a date on it is whether critical-mineral concentration is different in kind. The IEA's Global Critical Minerals Outlook 2025 reports that the average market share of the top three refining nations rose from 82% in 2020 to 86% in 2024, that 90% of supply growth came from the single largest supplier alone — Indonesia for nickel, China for cobalt, graphite and rare earths — and that China refines 19 of the 20 strategic minerals analysed at roughly 70% average share. Its own projection for 2035 is a top-three share of 82%: fifteen years of diversification policy returning concentration to where it started. Established Mark the framing. The IEA is an intergovernmental agency whose mandate is energy security and which treats concentration as a risk to be diversified away; the data quality is high and the framing is a framing. Frontier And the IEA's own numbers contain the counter-argument: lithium fell over 80% since 2023 after an eightfold rise in 2021–22, graphite, cobalt and nickel fell 10–20% in 2024, critical-mineral mining investment grew only 5% in 2024 — about 2% in real terms — and exploration plateaued. Prices collapsing while concentration rises is not what a cartel in formation looks like.

Frontier So: new chokepoint, or ordinary commodity cycle? The 1970s oil episode is the obvious analogue — a quadrupling in 1973, a doubling in 1979, then long-run demand response and a decade and a half of price decline — and its lesson is that concentration erodes through induced supply and substitution on a decadal lag. Frontier What is arguably new is that the choke point is refining rather than reserves, which makes it a capital-and-permitting problem rather than a geological one, and therefore in principle far quicker to duplicate. It has not been duplicated. Speculative That is either evidence that the barrier is higher than the capital-cost framing implies, or evidence that fifteen years is short for a refinery cohort. The 2030s price and share data together are the test, and both positions have committed to a prediction, which is unusual and welcome.

Speculative Two remedies are asserted far more confidently than the evidence carries. Transparency: the flagship instrument is the Extractive Industries Transparency Initiative and the published evaluation appears under a title that concedes the result — achieving disclosure, falling short on corruption reduction — with an accompanying literature identifying the absence of a sanctioning mechanism as the structural gap. This is a title-and-abstract-level reading in the pack behind this brief and no magnitude is quoted here for that reason. Speculative Local content: the claim that processing mandates build durable linkages has one live test at scale, Indonesia's nickel downstreaming, and the question that decides it is whether battery-chain value added materialises or the chain stops at stainless steel.

Established The first bottleneck is that the regressor does not measure what its name says. Resource dependence — the share of exports or GDP coming from primary products — is a ratio whose denominator is everything else the economy does. A country with a weak manufacturing sector scores as resource-dependent without any resource doing anything to it. Frontier Resource abundance — stocks in the ground, or discoveries — is the variable the theory is about, and it is the variable the identification-based papers use, which is why they get different answers. The abundance/dependence conflation is not a technicality; it is the whole disagreement compressed into one column of a dataset.

Established The second is country-sample sensitivity, and Davis's replication is the cleanest demonstration of it in development economics. Different specifications in the original ran on different sets of countries; hold the sample fixed at the 91 countries present throughout and three separate mechanism results stop being significant. Frontier That is not a criticism of one paper. It is a general warning about a literature built on cross-country regressions with variable coverage, and it means any mechanism claim in this field should be reported with the sample it was estimated on attached.

Frontier The third is instruments. Both the exorcism and the counter-exorcism depend on them: the reverse-causality result needs an instrument for dependence, the volatility result disputes the strength of exactly those instruments, and the discovery-based designs rely on the assumption that a major discovery is exogenous to the institutions of the country it is found in. Speculative No one has systematically tested that assumption against exploration effort, which is itself a function of policy and property rights.

Established The fourth is that the remedy literature has no denominator. There is a large descriptive literature on sovereign wealth and stabilisation funds and no cross-country audit anywhere of what fund inflow rules required against what actually flowed in. The single best-documented case is a failure, and it was documented by an anti-corruption research programme rather than by any fund association. Frontier Until that audit exists, the class-level claim that stabilisation funds stabilise is a claim about design documents.

Frontier The fifth is that Norway's rule has been complied with rather than tested. It has operated under continuous net inflow — about NOK 300 billion of it in 2025 alone — and has therefore never had to refuse a government anything it wanted. Established A rule that has never had to refuse is not evidence about rules, and the IMF's own recommendation that it be supplemented with expenditure limits is the surveillance body saying so in institutional language.

Frontier What this subject waits on is not a discovery in the ordinary sense; it is a decomposition. The one result that would change everything downstream is a mechanism for the resource curse that survives a consistent country sample. The correlation is not in dispute after Davis. The channel is, and the four candidates — institutional erosion, manufacturing decline, trade-openness dynamics, volatility — each fail or weaken when the sample stops moving between specifications. Speculative Nobody is producing this result, because producing it requires running the whole mechanism literature again on a fixed panel and publishing the nulls.

Frontier Second, sector-decomposed growth accounting on a common sample with the resource sector removed from both sides. This is the direct test of the composition hypothesis and the data exist: national accounts separate mining and quarrying value added, and the resource-dependent countries are the ones with the best-audited extractive accounts precisely because the revenue is fiscally central. Speculative It is a data-assembly project rather than a research programme, and its absence after a decade of the composition critique is a statement about incentives in the field.

Frontier Third, the discovery literature needs its own falsification arm. Smith's design compares countries after a major discovery with countries without one. The sharper comparison is against discoveries that were made and not developed — the geology arrived, the rent did not. That isolates the rent from the news, and the exploration and licensing records that would identify such cases are held by regulators and commercial data vendors.

Established Fourth, and unusually, one dependency here is a legal outcome rather than a measurement. Indonesia's nickel ore export ban was found to violate WTO rules and Indonesia kept it anyway, because the appeal went into a void created by the collapse of binding appellate review. That is a direct causal link between the enforcement question and the feasibility of resource nationalism, and it belongs to the trade-rules literature rather than to this one; it is noted here as an input and developed no further.

Established The cheapest high-value study in this subject is an audit nobody has run: fund inflow rules against realised inflows, across every country with a resource fund. The rules are published, the deposits are published, and the difference is arithmetic. For Nigeria that difference is roughly $70 billion over 2005–2015 with net transfers of minus $3.5 billion. Frontier What is unknown is whether Nigeria is the tail or the median, and the honest current answer is that nobody knows because nobody has counted. A single well-constructed table would convert the most confidently asserted policy claim in resource economics into a measurement.

Frontier Second, isolate the delegated-forecast feature. Chile's rule differs from most others in one specific way — an independent panel sets the medium-term copper price the budget is computed against. That is a discrete, codeable institutional feature. Coding every resource fiscal rule for whether the reference price is set inside or outside the finance ministry, and comparing outturns, is a small-N study that would nonetheless be the first evidence that the feature and not the country does the work. Speculative The obvious confound is that countries capable of delegating a forecast are capable of other things, and the design would have to carry that openly.

Frontier Third, pre-register the volatility interaction. The reconciliation position has never been tested as a primary hypothesis with the interaction specified in advance; every existing estimate is a specification found after the fact in a literature that has been searched exhaustively. Speculative A pre-registered replication on the post-2010 data, with volatility as the interaction and the sample fixed, is a cheap study that could retire or confirm the field's most promising reconciliation.

Frontier Fourth, the live natural experiments are already running and no one has announced a design for them. Indonesia's nickel export ban has been in force since January 2020 with escalating processing requirements through 2025 and is the canonical producer-side template; the Democratic Republic of the Congo replaced its February 2025 cobalt export ban in October 2025 with an annual quota of 96,600 tonnes for 2026–27, of which 10% is reserved for strategic national projects; Vietnam's December 2025 amendment restricts rare-earth mining and processing to government-approved companies and prohibits raw rare-earth exports; Zimbabwe banned unprocessed lithium exports in December 2022 and Namibia banned critical-mineral exports in June 2023. Speculative Five dated policy shocks in five jurisdictions with published trade data on both sides. Whether downstreaming builds value added or captures rent from processors is answerable within the decade and is currently being argued from prospectus material.

Speculative Fifth, the transparency instrument needs an evaluation with a sanction in it. The observed result is disclosure achieved and corruption reduction not demonstrated, with the missing sanctioning mechanism named as the structural gap. A staged introduction of a sanction — suspension of a benefit conditional on a disclosure failure — in a subset of participating countries is the design that would separate disclosure from enforcement. Handwave Whether any multi-stakeholder initiative could agree to randomise its own sanctions is a political question and the honest answer is almost certainly not.

Established A fiscal rule for a resource economy has exactly four moving parts and the record shows which one fails. A reference price or return the budget is computed against; a deposit rule saying what goes in when the outturn exceeds it; a withdrawal rule saying what may come out and under what conditions; and a body that sets the reference number. Norway's is an expected-real-return rule at 3% with the fund's market value as the base. Chile's is a structural-balance rule with the output gap and equilibrium copper price set by independent panels. Nigeria's was an oil-price-benchmark rule with the benchmark set in the annual budget process. Frontier The failure in Nigeria was upstream of the account: the legislature reduced the benchmark, which reduced what the rule required to be saved. The account then did exactly what its rule said.

Established Norway's denominator is the design flaw the IMF names and nobody else discusses. Spending is capped at a percentage of the market value of a globally diversified equity-heavy portfolio. That makes the fiscal ceiling a function of world equity prices, so a market rally loosens the budget constraint in exactly the years a stabilisation instrument should be tightening it. Frontier The IMF's recommendation of explicit medium-term expenditure limits alongside the rule is a proposal to add a second, price-insensitive binding constraint. Established It is also the reason this brief reports the fund in kroner: the country report returned a dollar figure for the fund that is internally inconsistent with the fund's known scale, and it is deliberately not printed here.

Established The Nigerian numbers are worth restating as a sequence rather than a total, because the sequence is the finding. A fund near $20 billion. Withdrawals peaking in 2011 — the highest-revenue year on record. Net transfers over 2005–2015 of minus $3.5 billion. A balance of $72 million going into the pandemic. Frontier A stabilisation fund drawn down hardest in a boom is not a stabilisation fund; it is a current account with a name on it, and the study that documented it names patronage networks operating outside the formal structures as the mechanism.

Frontier On the supply side, the engineering constraint has moved from geology to refining, and that changes what a policy response has to build. Duplicating reserves requires exploration and luck. Duplicating refining requires capital, permits, offtake and a decade — and, for several of these minerals, a tolerance for the effluent streams that are the reason the capacity concentrated where it did. Established More than half of a broader group of energy-related minerals are now under some form of export control, with China's December 2024 restrictions on gallium, germanium and antimony and the DRC's February 2025 four-month cobalt suspension the named recent instruments. Frontier Copper faces a potential 30% supply shortfall by 2035 on the IEA's projection — a demand-side constraint on every electrification programme, and one that arrives through price rather than through unavailability.

Frontier Secondary supply is the one lever that acts on concentration without requiring a new mine. Recycled material already supplies 33% of copper demand and 31% of nickel demand, recovery from available feedstock runs over 40% for cobalt against 20% for lithium, and projections to 2050 put copper near 40% and battery metals at 20–30% of demand. Established Collection rates run 40–50% in Europe and North America, below 5% in developing Asia and Latin America and 1% in Africa. Frontier Here the point is narrow and belongs to this brief only as a concentration remedy: secondary supply reduces import dependence at the margin and does not touch refining concentration, because the refining step is the same step. The market structure of secondary materials, and whether those loops clear on price at all, is a different subject and is treated at Industrial Ecology and in this category's circular-economy slot.

Within this map: Space Resource Economies, which owns off-world extraction entirely and is the boundary this brief keeps; Institutional Design, where the general problem of a rule that must bind against the interest of the body applying it is stated abstractly; Future Federalism, whose equalisation formulas are the same rent-sharing problem inside a country rather than across one; Long-Term Institutions, where a sovereign fund is one of the few working examples of an institution designed to outlive its founders; and Industrial Ecology, which owns secondary material flows as a physical system.

On the demand side the minerals question runs into Advanced Battery Technologies and Energy Storage Revolutions, where chemistry choice is also a supply-concentration choice, and into Zero Carbon Industrial Systems, whose build-out is the source of the projected demand.

Outside it: public finance and the theory of optimal resource taxation; the political economy of rents and state formation; commodity market microstructure, which supplies the volatility the whole reconciliation position rests on; and international investment law, which supplies the arbitration risk attached to every resource-nationalist measure named here.

Established The institutional finding of this brief is about bindingness, and it is sharper than the usual call for better governance. Every fund in the record has a rule. The rules differ in one respect that predicts the outturn: whether the number the rule is computed against is set by a body that can be overruled by the government the rule constrains. Chile delegates it to independent panels. Norway fixes it as an expected real return on a published market value. Nigeria set it inside the annual budget, and it was reduced. Frontier That is not a governance-quality variable; it is a specific institutional feature that can be coded, and it is recorded as a typed requirement below because it is something a legislature could choose to supply.

Established Several of the best sources here are interested parties and the direction of each interest matters. The Norwegian state's petroleum portal reports on the Norwegian state's fund. The IEA's data are good and its mandate is energy security, so concentration appears as risk. A law firm's client alert supplies the dated resource-nationalism measures and its framing is investor-protective. Established Two bodies of evidence run against the interest of the people producing them — the academic critics dissolving their own field's signature finding, and the IMF telling a compliant government its rule needs a second constraint — and both are weighted up for it.

Frontier The transparency apparatus is the clearest case of an institution built on a channel claim that did not survive. Disclosure was the intervention; institutional erosion through opacity was the channel; and the channel is one of the ones that fails on a consistent sample. The evaluation record matches: disclosure achieved, corruption reduction not demonstrated, no sanctioning mechanism. Speculative A remedy whose theory of change is a mechanism the data cannot confirm is not thereby wrong, but it is unevaluable in its own terms, and that is a stronger criticism than the usual complaint about compliance costs.

Established Resource nationalism is now a datable institutional wave rather than a mood. Indonesia's ore export ban since January 2020; the DRC's cobalt ban of February 2025 and its replacement by a 96,600-tonne annual quota with a 10% strategic-project reservation; Vietnam's December 2025 restriction of rare-earth activity to approved companies; Chile's lithium remaining non-concessionable so that access requires a state contract; Zimbabwe in December 2022, Namibia in June 2023, Ghana's 2023 minerals policy. Frontier The enabling condition is that the cost of maintaining a measure found to breach trade rules has fallen, because the appellate stage that would have made the finding binding no longer functions.

Established The distributional question is the one the growth literature is worst at, and Botswana is the example. Thirty-five years of the world's fastest per-capita growth coexisted with a Gini of 0.54–0.56, high unemployment and adult HIV prevalence of 25–30%, all recorded by the authors making the success argument. Frontier A national aggregate that quadruples relative to its region while inequality sits in the top decile of the world distribution is a description of two things happening at once, and citing the first without the second is the most common single error in this subject.

Frontier Rent creates a specific political problem that no fiscal design removes: the state's income does not depend on its citizens. A government financed by extraction does not need to tax, and a government that does not need to tax has weaker reasons to bargain. That is the strongest version of the institutional-erosion story, and it is also the version that fails on a consistent country sample, which leaves it in an uncomfortable position — theoretically compelling, empirically unconfirmed at cross-country scale. Speculative The within-country evidence is thinner still, and the honest statement is that the mechanism most people believe in is the one with the weakest measurement behind it.

Established Resource nationalism redistributes value and imposes costs on identifiable people in both directions. An ore export ban transfers rent from foreign processors to domestic ones and raises input costs for downstream manufacturers elsewhere; a strategic-project reservation inside a quota allocates rent administratively; a state-contract requirement for lithium makes access a political decision. Frontier None of that is illegitimate — it is what sovereignty over subsoil resources means — but the beneficiaries are concentrated and the costs are diffuse, which is the structure that reliably produces persistent policy regardless of whether it works.

Frontier And the transparency programme raises a question its designers did not intend. Publishing revenue flows in a state where the flows are captured by patronage networks discloses a fact to people who cannot act on it. The evaluation record says disclosure rose and corruption reduction was not demonstrated. Speculative Whether disclosure without a route to sanction is a step toward accountability or a substitute for it is not settled by anything in this record, and the answer probably differs by country in ways the cross-country designs cannot see.

Frontier The largest thing this subject is about is that mineral rent is the main way a poor state can become fiscally capable without first becoming productive. That is why the question matters beyond the countries concerned: roughly the entire projected build-out of electrified energy systems runs through minerals whose refining is concentrated in a handful of jurisdictions, and the terms on which those rents are shared are being renegotiated now, in public, in dated instruments. Established The IEA's own projection has top-three refining concentration at 82% in 2035 — back where it was in 2020.

Frontier The 1970s remain the only completed episode at this scale, and its lesson is decadal. A quadrupling and then a doubling of oil prices, followed by substitution, efficiency and new supply, and a long price decline. Speculative If minerals follow that path the current concentration is a phase; if the refining chokepoint behaves differently because it is capital and permitting rather than geology, the phase could be much longer, because capital goes where the effluent rules and the offtake contracts are, not where the ore is. Both readings are live and the 2030s data discriminate between them.

Speculative The deeper civilizational claim in circulation — that resource abundance is a developmental trap and diversification is destiny — is not supported at the level of confidence with which it is asserted. The correlation is real and the mechanism is unidentified, two countries with strong prior institutions did well, one country with a fund and a rule ended with $72 million, and the best identification-based work finds discoveries raising income levels. Handwave Any story about the long-run fate of resource-rich societies is currently an extrapolation from a correlation whose channel nobody can name.

These horizons track dated policy instruments, published projections and commodity cycles rather than technology:

• 10 yr: Established Five dated instruments resolve inside this window: Indonesia's downstreaming requirement, in force since January 2020 and escalating through 2025; the DRC's cobalt quota of 96,600 t for 2026–27 with 10% reserved for strategic national projects; Vietnam's December 2025 rare-earth law; Chile's state-contract regime for lithium under a new administration from March 2026; and the IEA's projection of an 82% top-three refining share by 2035. Frontier Expect the Indonesian case to be decided on whether value added moves past stainless steel into battery chemicals, and expect no published cross-country audit of fund inflow rules unless someone commissions one. Frontier Norway's rule stays inside its ceiling while net inflows continue, which tells us nothing about the rule.
• 25 yr: Speculative The plausible split is that identification improves where discoveries and within-country variation allow it and stays absent for the cross-country mechanism question, because a 91-country problem is not fixed by adding countries. Speculative On the supply side, either refining duplicates on the decadal lag the 1970s analogue predicts, or it does not and the chokepoint reading is confirmed by default rather than by argument. Handwave Which of those happens is a function of permitting and capital allocation decisions nobody has announced.
• 50 yr: Speculative If the volatility reading is right, the long-run distribution of resource-economy outcomes tracks the distribution of macroeconomic stability rather than of resource endowment, and stabilisation instruments matter more than diversification programmes. Speculative If the composition reading is right, the entire policy apparatus was aimed at an artefact and the measured differences will disappear as resource sectors shrink in relative terms. Handwave Both are extrapolations from a disagreement that is currently unresolved by design rather than by data availability.
• 100 / 250+ yr: Handwave Beyond useful forecasting. The only comparably long data point is that mineral rents have been reorganising states since long before the statistics existed, and the one thing the record supports at that horizon is that institutions present before the rent arrived predict what happens after it — which is an observation about two countries, not a base rate.

• Depends on Nothing on this map. This brief waits on no result another brief produces. Its unresolved questions are questions about country panels and administrative records, not about physics or biology, and the missing work could be published from data that already exists. No typed depends-on edge is claimed.
• Requires (not on this map) Three things this subject waits on, none of them a result another brief produces. First, a withdrawal rule that binds in the peak-revenue year — which is the specific thing every fund in the record either has not been tested on or has failed. Nigeria's Excess Crude Account peaked near $20bn, saw its heaviest withdrawals in 2011, the year of the country's highest oil revenues, ran net transfers of minus $3.5bn across 2005–2015 and held $72m before the pandemic. Norway's rule has been complied with at 2.7% against a 3% ceiling under continuous net inflow of about NOK 300bn in 2025 and has therefore never had to refuse anything; the IMF's own recommendation is that it be supplemented with explicit medium-term expenditure limits, because its denominator is the market value of a global equity portfolio. Second, a budget reference price set outside the finance ministry: Nigeria's failure ran through legislative reduction of the oil-price benchmark, which reduced what the rule required to be saved, while Chile's rule delegates the output gap and the medium-term copper price to independent expert panels and produced a surplus of almost 9%, debt down to 4% of GDP and roughly 12% of GDP saved across 2003–2008. The delegation of the forecast, not the existence of the account, is the codeable feature. Third, a resource-curse mechanism that survives a consistent country sample: Davis's replication found the headline correlation robust across resource-intensity measures, a 1970–2010 sample extension and country samples of 105–113, while on the consistent 91-country subsample the institutional-quality channel, the manufacturing-decline regression and the U-shaped trade-openness relationship all lose significance. The first two are institutional choices a legislature could make; the third is a result nobody is producing, and without it the funds, rules, transparency programmes and diversification strategies built on channel claims cannot be evaluated in their own terms.
• Enables In principle every electrification programme on this map inherits the mineral supply structure recorded here, and every argument about sovereign long-horizon saving inherits the fund record. No typed enabling edge is claimed, because the relationship has never been measured: no study connects a resource fiscal rule to a downstream industrial outcome, and the concentration figures are projections rather than constraints anyone has priced into a build programme.
• Adjacent Public finance and optimal resource taxation; the political economy of rents; commodity market microstructure, which supplies the volatility the reconciliation position depends on; international investment and trade law, which supplies the enforcement gap resource nationalism operates in; and within this map Space Resource Economies, Institutional Design and Long-Term Institutions.

Frontier “The resource curse is an established empirical regularity.” It is a robust correlation with no robust mechanism, and it is actively contested by identification-based work that finds the opposite sign — discoveries raising income levels, oil and mineral wealth positive with regional dummies, conflict raising dependence rather than the reverse. Established Flag it frontier, never established, and when quoting it name the sample: three separate mechanism results in the canonical paper stop being significant when the 91 countries present throughout are the only ones used.

Established “Botswana proves that good management of resource wealth works.” The paper that made Botswana famous explicitly denies that diamonds are the explanation and attributes the outcome to pre-colonial institutions that constrained elite power, light colonial rule that left them intact, and the transfer of mineral rights to national ownership at independence. Established The same paper records HIV prevalence of 25–30%, a Gini of 0.54–0.56 and “soft authoritarian” tendencies, and questions whether those institutions can handle them. It is an argument that institutions preceded the diamonds.

Established “Norway's fiscal rule proves fiscal rules work.” Norway's rule has been complied with — 2.7% against a 3% ceiling in 2025 — under conditions of continuous net inflow, with 2025 seeing about NOK 300 billion more going in than coming out. Frontier It has never had to refuse a government anything, its denominator is a global equity portfolio, and the IMF recommends supplementing it for exactly that reason. Compliance under easy conditions is not a test.

Frontier “Sovereign wealth funds stabilise resource economies.” There is no cross-country audit of fund inflow rules against realised inflows anywhere in the literature. Established The single best-documented case went from about $20 billion to $72 million, with net transfers of minus $3.5 billion over a decade and peak withdrawals in the peak-revenue year. The class-level claim rests on design documents, not on outturns.

Frontier “Critical-mineral concentration is unprecedented and irreversible.” Concentration is real and rising — top-three refining share from 82% to 86%, China refining 19 of 20 strategic minerals — and the same source's data show lithium down over 80% since 2023, other battery metals down 10–20% in 2024, mining investment growth of 5% nominal and about 2% real, and exploration plateauing. Established Prices collapsing while share rises is not market power being exercised. The genuinely novel claim — that the chokepoint is refining rather than reserves — is the one worth arguing about, and it cuts both ways, because refining is in principle far easier to duplicate than geology.

Speculative “Transparency reduces corruption in extractives.” Disclosure demonstrably increased. The corruption effect is not established; the published evaluation appears under a title conceding as much, and the identified structural gap is the absence of a sanctioning mechanism. Handwave This brief reads that literature at title-and-abstract level and prints no magnitude, which is the honest limit of what the underlying research pass established.

Established One number is deliberately withheld, and naming the absence stops it reading as an oversight. The IMF country report consulted for this brief returned a dollar figure for the Government Pension Fund Global, together with a percentage-of-mainland-GDP figure, that are internally inconsistent with the fund's known scale and appear to be a mis-extraction from a net-international-investment-position table. It is not printed here. The kroner figures come from the fund's own portal and are marked as an interested party; the 2.7%-of-fund compliance figure and the policy recommendations from the same report are used, because they are internally consistent and are the substance of the surveillance.

Established And one whole class of claim is out of scope rather than disputed. Asteroid platinum-group metals, lunar water and in-space propellant markets are not treated here in any direction, including as a forward-looking aside about future terrestrial prices. That subject has its own brief and its own evidence, and the single conclusion the two share — that abundance is never the binding constraint — is made there. Handwave Anyone using off-world supply as an argument about terrestrial mineral concentration on a policy-relevant horizon is asserting a cost curve nobody has measured.