How this sample was chosenWe screened accessible, attributable columns published from May through December 2016 and retained six distinct claims with a direction, mechanism and observable outcome. Purely descriptive arguments, campaign endorsements, conditional plans tied to a Clinton victory and repeated versions of the same thesis were excluded.
01
Markets
Post-election sell-off
Election-night forecast“The market might never recover from Trump’s victory”
Writing while futures were plunging, Krugman offered ‘never’ as his first-pass recovery date. The regular session rose instead. By May 2026 the S&P 500 price index stood above 7,400, against roughly 2,140 on election day. Midnight macroeconomics met the opening bell and lost jurisdiction.
The New York Times · Nov. 9, 2016 ↗Observed realityMissThe S&P 500 recovered immediately and later more than tripledMiss
02
Macroeconomics
Trump slump
Fiscal-policy correction“Do not expect an immediate slump; deficit stimulus could lift the economy for a while”
Three days after the market call, Krugman separated distaste for the incoming administration from short-run demand arithmetic. Tax cuts were a poor stimulus, he argued, but still a stimulus. Real GDP grew through 2019 and unemployment fell to a half-century low before Covid supplied an entirely different recession.
Business Standard / NYT · Nov. 15, 2016 ↗Observed realityHitGrowth continued and unemployment reached 3.5% before the pandemicHit
03
Trade & growth
Brexit
Long-run damage“Brexit would create a sustained income loss, a weaker pound, but no dramatic financial crisis”
The direction and mechanism aged well: new trade frictions lowered Britain’s economic potential without producing a 2008-style seizure. The OBR now assumes a 4% long-run productivity loss and 15% lower trade intensity. That is not the same object as Krugman’s 2% real-income estimate, so precision receives no honorary doctorate.
La República / NYT · Jun. 18, 2016 ↗Observed realityPartialOfficial estimates show lasting damage; the crisis did not arrive, but the 2% magnitude remains uncertainPartial
04
Trade policy
Tariff war
Retaliation forecast“A Trump trade war would bring retaliation and supply-chain disruption, but probably not global recession”
Krugman named the vulnerable sectors—agriculture and aircraft—and distinguished costly disruption from a Depression sequel. USTR’s later review found Chinese retaliation hurt US exports, tariffs redirected sourcing and the economy-wide effects were small. A forecast with nouns, verbs and a scale estimate: luxury goods in opinion journalism.
Portland Press Herald / NYT · Dec. 27, 2016 ↗Observed realityHitTariffs and retaliation arrived in 2018; disruption was real and aggregate damage modestHit
05
Climate & energy
Clean-power transition
Technology versus politics“Renewables and storage were becoming viable while Trump would reverse federal climate action”
The technology kept improving even as Washington changed direction. Utility-scale battery capacity expanded from 1.5 GW in 2020 toward 30 GW in 2025, while the administration formally began leaving Paris and replaced Obama’s power-plant rule. The electrons declined to observe party discipline.
Portland Press Herald / NYT · Aug. 23, 2016 ↗Observed realityHitBattery and solar deployment surged; Trump exited Paris and repealed the Clean Power PlanHit
06
Distributional policy
Inequality
Policy-direction forecast“A Trump victory would sharply reverse Obama-era efforts to restrain inequality”
Krugman’s forecast was about the direction of policy, not a promise that one president could move every inequality series on command. The 2017 tax law permanently cut the corporate rate, and the 2018 regulatory-relief law loosened prudential requirements for many banks. Populist packaging; supply-side contents.
Portland Press Herald / NYT · May 23, 2016 ↗Observed realityHitCorporate taxes fell to 21% and Congress eased important Dodd–Frank rulesHit
Including both the election-night market call and the calmer correction three days later is the right choice. Forecasting skill includes updating quickly, but the original miss does not evaporate because the retraction was prompt.
Exactly. The ledger records both claims as published. Intellectual flexibility earns credit on the second call; it does not issue a refund on the first.
The trade-war forecast is stronger than the usual ‘tariffs are bad’ opinion. It named retaliation, agriculture, aircraft, supply chains and the absence of a global recession. That is enough surface area to be wrong in several interesting ways.