STAGE 1 — EVIDENCE BRIEF
Referee panel: Prof. Olivia Brandt (#57, statistics, C) · Prof. June Takahashi (#17, econometrics, C) · Domain specialist Prof. Miriam Castellano (#1, labor economics, C-L)
Ground rules from the referees: every figure below was checked against the linked source on or before 2026-09-24. Where we could not verify a number we say so. Where a source is advocacy-affiliated (EPI, AEI, CBPP, Heritage, etc.) we flag it. "Year" means the year of the data, not the publication.
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A. Wages and the productivity–pay debate
- EPI's headline gap. Net productivity rose 93.7% from 1979Q4 to 2026Q2; hourly compensation of the "typical worker" (production/nonsupervisory) rose 32.7% — productivity grew ~2.9× as fast. (EPI, data through 2026Q2) — https://www.epi.org/productivity-pay-gap/ [left-leaning, labor-funded institute]
- EPI on wages alone. Cumulative real median wage growth was 29% from 1979 to 2024 (<0.6%/yr); in tight labor markets 10th-percentile real wages grew 2.7%/yr on average versus −0.6%/yr in other years. (EPI, data 1979–2024) — https://www.epi.org/blog/how-should-we-assess-and-characterize-workers-wage-growth-in-recent-decades/
- The Winship (AEI) critique. 1973–2022: nonfarm productivity +111%, median hourly compensation +40%, median wages +33%. Winship argues (a) CPI overstates inflation relative to the output deflator used for productivity, (b) benefits matter, (c) net (post-depreciation) productivity is the right benchmark, and (d) under consistent deflators "aggregate worker pay has kept up with productivity." (AEI, May 2024; data through 2022) — https://www.aei.org/wp-content/uploads/2024/05/Understanding-Trends-in-Worker-Pay.pdf [right-of-center institute]
- The link is not "broken." Stansbury & Summers: 1973–2016, a 1-pp increase in productivity growth is associated with 0.7–1.0 pp higher median and average compensation growth; they find little support for technology-driven decoupling and point to other (institutional) causes of the level gap. (NBER w24165, 2017) — https://www.nber.org/papers/w24165
- Latest labor-market snapshot. August 2026: payrolls +162,000; unemployment 4.1%; average hourly earnings +3.1% y/y; trailing-12-month average payroll gain only 31,000/month. (BLS Employment Situation, Aug 2026) — https://www.bls.gov/news.release/empsit.nr0.htm
B. Income and wealth distribution
- CBO long run. 1979–2021: average income before and after transfers and taxes rose for all quintiles, but grew most in the top quintile; Gini coefficients both before and after transfers and taxes increased. (CBO, Sept 2024; data 1979–2021) — https://www.cbo.gov/publication/60342
- CBO most recent year. 2022→2023: lowest-quintile income +5%; top 1% income −9% (mainly lower capital gains); ~134 million households, ~$20 trillion total income. (CBO, 2026; data 2023) — https://www.cbo.gov/publication/62761
- Auten–Splinter (2025 update). Top 1% share of pre-tax income 11.2% (1962) → 15.5% (2022); after-tax 8.6% → 10.3%. (Auten & Splinter, 2025 update) — https://davidsplinter.com/AS-Update-2025.pdf
- Piketty–Saez–Zucman side. Top 1% share of fiscal (tax-return) income 8.3% (1960) → 18% (2019); for 2014, PSZ after-tax top-1% share was 15.7%, AS's estimate 6.6 pp lower. Critiques of AS: allocation of underreported income, allocation of government consumption (39% of bottom-50% income by 2019 in AS vs 7% for top 1%), deficit allocation, and tension with rising wealth concentration. (Washington Center for Equitable Growth, 2024) — https://equitablegrowth.org/new-research-doesnt-overturn-consensus-on-rising-u-s-income-inequality/ ; PSZ reply: http://gabriel-zucman.eu/files/PSZ2024.pdf [Equitable Growth is left-of-center]
- Record-high median income, flat SPM. 2025 median household income $87,460 (+2.6%, record); official poverty 10.2% (record low); SPM 13.1%, not statistically different from 2024; official child poverty 13.4% (record low). Social Security moved 28.8 million people out of SPM poverty. (Census P60-290, Sept 2026; data 2025) — https://www.census.gov/library/publications/2026/demo/p60-290.html ; https://stateline.org/2026/09/15/census-data-shows-us-poverty-rate-drops-to-lowest-on-record-but-experts-are-cautious/
- 2025 reconciliation law (P.L. 119-21) distribution. CBO: over 2026–2034 the lowest decile loses ~$1,200/yr (−3.1% of income), mainly from Medicaid/SNAP reductions; the top decile gains ~$13,600/yr (+2.7%), mainly from tax cuts. (CBO, Aug 2025) — https://www.cbo.gov/publication/61367
- Wealth concentration. Referees' note: we attempted to pull the latest Federal Reserve Distributional Financial Accounts shares (updated Sept 18, 2026) but could not retrieve the table. No wealth-share figure is entered into evidence; any professor citing one is on their own. — https://www.federalreserve.gov/releases/z1/dataviz/dfa/distribute/table/
C. Mobility and place
- Fading American Dream. Share of children earning more than their parents (inflation-adjusted, at ~age 30): ~90% for the 1940 cohort → ~50% for the 1980s cohort. Counterfactuals: 1940s–50s GDP growth with today's distribution → 62%; today's GDP with 1940s-style distribution → 80%. Most of the decline is attributed to distribution, not growth. (Chetty et al., Science 2017) — https://opportunityinsights.org/paper/the-fading-american-dream/
- Moving to Opportunity. Moving a child from public housing to a low-poverty area at age 8 raises lifetime earnings by ~$302,000 (~$99,000 present value); effects for children who moved at 13–18 were zero or slightly negative; little effect on adults' earnings. (Chetty, Hendren & Katz, AER 2016) — https://opportunityinsights.org/paper/newmto/
- Opportunity Atlas. For children from low-income families, the SD of household income at 35 across tracts within the same county is ~$5,000; observational tract estimates are highly predictive of causal effects; job growth correlates only weakly with upward mobility. (Chetty et al., 2018/2025) — https://opportunityinsights.org/paper/the-opportunity-atlas/
D. Trade and tariffs
- China shock persistence. Greater import exposure reduced the manufacturing employment-to-population ratio by 1.54 pp in exposed commuting zones; 86% of the net job loss showed up as lower employment rates rather than out-migration; transfers rose modestly and mostly as Social Security and Medicare. (Autor, Dorn & Hanson, NBER w29401, 2021; data 2000–2019) — https://www.nber.org/papers/w29401
- TAA. ADH describe TAA's effect on per-capita income in trade-exposed areas as "vanishingly small" (Brookings summary). TAA's authorizing provisions terminated July 1, 2022; no new certifications since. (DOL ETA, accessed 2026) — https://www.brookings.edu/articles/on-the-persistence-of-the-china-shock/ ; https://www.dol.gov/agencies/eta/tradeact
- 2025–26 tariffs. Average statutory tariff rate 11.0% (Aug 24, 2026), after Section 122 tariffs expired July 24 and were replaced under Section 301; long-run consumer price effect ~0.7%; ~$1,100 per household per year; ~$1.9 trillion 10-year revenue net of GDP feedback. (Yale Budget Lab, Aug 2026) — https://budgetlab.yale.edu/research/state-us-tariffs
- 2018 tariffs and manufacturing jobs. Moving an industry from the 25th to 75th percentile of tariff exposure → −1.4% manufacturing employment: import protection +0.3%, input costs −1.1%, retaliation −0.7%. (Flaaen & Pierce, Fed FEDS 2019-086) — https://www.federalreserve.gov/econres/feds/files/2019086pap.pdf
- Manufacturing now. Manufacturing employment +16,000 in August 2026 and +58,000 since a recent low in December 2025. (BLS, Aug 2026) — https://www.bls.gov/news.release/empsit.nr0.htm
E. Labor institutions
- Unions. 2025 membership rate 10.0% (14.7 million); public sector 32.9%, private 5.9%; 1983: 20.1%. Median weekly earnings $1,404 union vs $1,174 nonunion (unadjusted for occupation, industry, demographics). (BLS, Feb 2026; data 2025) — https://www.bls.gov/news.release/union2.nr0.htm
- Minimum wage — bunching evidence. 138 state increases 1979–2016: the number of low-wage jobs "remained essentially unchanged over five years"; modest spillovers; some evidence of job loss in tradable sectors. (Cengiz, Dube, Lindner & Zipperer, QJE 2019) — https://www.nber.org/papers/w25434
- CBO on $15. 2019: median estimate 1.3 million jobs lost, 1.3 million out of poverty, 17 million raises. 2021 (Raise the Wage Act): 1.4 million jobs lost (0.9% of workforce), 0.9 million out of poverty, 17 million raised plus ~10 million near the threshold. CBO's median short-run elasticity for directly affected workers: −0.25. (CBO 2019, 2021) — https://www.cbo.gov/system/files/2021-02/56975-Minimum-Wage.pdf ; https://www.npr.org/2021/02/08/965483266/-15-minimum-wage-would-reduce-poverty-but-cost-jobs-cbo-says ; https://www.cbo.gov/publication/57049
- Seattle. UW team (Jardim et al.): the step to $13 reduced hours in low-wage jobs by 6–7% while hourly wages rose ~3%, a net loss of ~$74/month in low-wage-job earnings (revised 2018 version); effects concentrated on less-experienced workers; minimal restaurant-only effect. Critics (EPI; Reich et al. at Berkeley) cite exclusion of multi-site employers (~40% of workforce) and Seattle's boom; Berkeley restaurant study found no negative employment effect. — https://www.nber.org/papers/w23532 ; https://www.aeaweb.org/articles?id=10.1257%2Fpol.20180578 ; https://www.epi.org/publication/the-high-road-seattle-labor-market-and-the-effects-of-the-minimum-wage-increase-data-limitations-and-methodological-problems-bias-new-analysis-of-seattles-minimum-wage-incr/
- Licensing. 24.0% of employed people hold an active certification or license; 21.6% hold a government license. (BLS CPS, 2025) — https://www.bls.gov/cps/cpsaat49.htm
F. Work and participation
- Prime-age participation. May 2025: prime-age men 89.2% (highest since fall 2009), women 77.7%. (Hamilton Project, July 2025) — https://www.hamiltonproject.org/publication/economic-fact/seven-economic-facts-about-prime-age-labor-force-participation/
- Long-run male non-participation. Prime-age male non-participation rose from 2.9% (1950s) to 10.9% (2023); ~38% of non-participating men report disability; both "push" (skills mismatch, manufacturing decline) and "pull" (education, caregiving) factors matter; ~80% of the intergenerational gap explained by observables. (SF Fed WP 2025-07) — https://www.frbsf.org/wp-content/uploads/wp2025-07.pdf
G. Child Tax Credit and family
- 2021 CTC. SPM child poverty 9.7% (2020) → 5.2% (2021); the CTC kept 2.9 million children out of poverty in 2021, ~2.1 million attributable to the ARPA expansion itself. (Census, Sept 2022) — https://www.census.gov/library/stories/2022/09/record-drop-in-child-poverty.html
- Employment effects — simulation vs observation. Corinth, Meyer, Stadnicki & Wu (2021, simulation): a permanent expansion would lead 1.5 million working parents (2.6%) to exit. Ananat, Glasner, Hamilton & Parolin (observational, 2021 data): "very small, inconsistently signed, and statistically insignificant" employment effects — while noting a temporary program gives a lower bound on permanent effects. — https://www.nber.org/system/files/working_papers/w29823/w29823.pdf ; https://onlinelibrary.wiley.com/doi/full/10.1002/pam.22528
- 2025 CTC law. P.L. 119-21: CTC $2,200 per child from 2025, indexed; refundable maximum $1,700; phase-in unchanged at 15% of earnings over $2,500; now requires a valid SSN for the taxpayer (one spouse if joint) as well as the child — Tax Policy Center estimate ~500,000 otherwise-eligible children lose access; families earning roughly $0–$26,000 gain nothing from the increase. (Bipartisan Policy Center, 2025) — https://bipartisanpolicy.org/article/how-the-obbb-changes-to-the-child-tax-credit-will-impact-families/
- Fertility. 2025 births 3,606,400 (−1%); general fertility rate 53.1 per 1,000 women 15–44 (record low); teen birth rate 11.7, record low. (CDC/NCHS provisional, Apr 2026) — https://www.cdc.gov/nchs/pressroom/releases/20260409.html
- Household structure. 1974: 54% of families had own children under 18 at home; 2024: 39%. Family households: 79% → 64% of all households. (Census, Nov 2024) — https://www.census.gov/newsroom/press-releases/2024/families-and-living-arrangements.html
- Deaths of despair. Midlife mortality of white non-Hispanics without a degree went from ~30% below Black Americans' (1999) to ~30% above (2015), driven by drugs, alcohol, suicide. (Case & Deaton, BPEA 2017) — https://www.brookings.edu/bpea-articles/mortality-and-morbidity-in-the-21st-century/
H. AI and labor
- Early-career canaries. Workers aged 22–25 in the most AI-exposed occupations: employment 19% below the path of less-exposed peers (Nov 2022–June 2026), widened from ~15% in the Aug 2025 version; declines concentrated where AI automates, flat or rising where it augments. (Brynjolfsson, Chandar & Chen, Aug 2026 revision) — https://digitaleconomy.stanford.edu/app/uploads/2026/08/Canaries_August2026.pdf
- No aggregate disruption (yet). Through July 2025, "the broader labor market has not experienced a discernible disruption"; occupational mix shifted ~1 pp, a trend that pre-dated ChatGPT. (Yale Budget Lab, 2025) — https://budgetlab.yale.edu/research/evaluating-impact-ai-labor-market-current-state-affairs
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CONTESTED EVIDENCE (where competent researchers genuinely disagree)
C1. Has pay decoupled from productivity? EPI (#1–2) uses typical-worker compensation deflated by CPI against net productivity; Winship/Strain (#3) use consistent output deflators, average compensation, and find aggregate pay tracks productivity. Referee view (Takahashi): these are different questions. The level gap between median pay and average productivity is real and is mostly (a) rising pay inequality and (b) deflator divergence, plus (c) a smaller labor-share decline. Stansbury–Summers (#4) show the marginal link persists. Anyone saying "no gap" or "pay flat since 1973" is wrong on at least one of those questions.
C2. How much did top incomes rise? PSZ vs Auten–Splinter (#8–9). They agree on fiscal income; they disagree on imputations (underreported income, retirement income, government consumption, deficits). Brandt: AS's own numbers show a +4.3 pp pre-tax top-1% rise since 1962 — "inequality didn't rise" is not what AS find; "after-tax top share barely rose" (+1.7 pp) is. CBO (#6) sits between.
C3. Minimum wage employment effects. Cengiz et al. (#22) vs Seattle/UW (#24) vs CBO's synthesis (#23). The bunching studies cover increases up to roughly the middle of the historical range; they say less about a $15 federal floor in low-wage states — which is exactly where CBO's job-loss estimates bite.
C4. CTC labor supply. Simulation (Corinth et al.) vs short-run observational (Ananat et al.) (#29). The observational estimate is from a temporary, 6-month, pandemic-era program; the simulation relies on elasticities from the 1990s welfare-reform era. Neither settles the permanent-policy question.
C5. Tariffs and manufacturing. 2018 evidence (#19) says net-negative for manufacturing employment; 2026 data show modest manufacturing gains since December 2025 (#20). A 58k uptick over eight months is not an identified tariff effect in either direction.
C6. AI. Stanford "canaries" (#34) find a large, growing age-specific effect; Yale Budget Lab (#35) finds no aggregate disruption. These are compatible (a narrow entry-level effect inside a stable aggregate), but whether the young-worker effect is AI or post-2022 tech-sector retrenchment/interest rates is disputed.
C7. Family structure and child outcomes. Kearney (The Two-Parent Privilege, 2023) argues the decline in two-parent homes among non-college adults is a first-order driver of child disadvantage; critics argue selection and income explain much of it. Referees could not retrieve Kearney's exact tabulations this round; her qualitative thesis is entered, her specific percentages are not.
C8. Marriage penalties in means-tested programs. No quantitative source verified this round. Existence of penalties in EITC/Medicaid/SSI is structural (phase-outs on combined income); their behavioral effect on marriage is small-to-uncertain in most published work. Treated as Unknown magnitude.