The populism frontier moves from grievance correlations to causal designs and mechanisms

Asked:

“what are the latest quantitative research on populism published in top political science or economics journals.”

Ten recent quantitative articles (first online 2024–2026, screened as of 3 September 2026) from eight flagship or highly ranked outlets — APSR, BJPolS, EJPR, Political Behavior, CPS, AEJ: Economic Policy, Economica and EJPE — spanning experiments, quasi-experiments, large linked panels and computational network analysis. This is a curated recent frontier, not an exhaustive census.

Research-frontier timeline, latest first

Political science Economics Shape = design: ● experiment■ quasi-experiment▲ panel / observational◆ panel + experiment✱ computational / network

The strongest new causal claims come from quasi-random variation: in Germany, successful vs failed right-wing terror attacks significantly raise AfD vote share and pro-AfD, anti-migration attitudes — aeaweb.org

Populist finance is not simply plutocratic: Trump lost 73% of Romney's top-1% dollars in 2016 yet grew bottom-90% giving 172% by 2020 — while the top 10% still supplied about 55% of his itemized 2020 dollars — cambridge.org

Attitudes move more easily than votes: an inequality information treatment raised populist attitudes by 0.04 SD but did not shift party support in Germany, Denmark and Italy — cambridge.org

Turnout is a neglected channel: about 40% of the insecurity-driven rise in populist voting in Europe runs through who shows up at all — wrap.warwick.ac.uk

The ten articles

Reading the estimates. Experimental and quasi-experimental effects above carry a causal design; panel and cross-sectional associations (globalization exposure, downward mobility, well-being, perceived inequality in the ISSP) should not automatically be read causally. Far-right-party studies are included only where the outlet or article explicitly identifies the party or movement as populist, or the study sits directly in the populism research program. Adjacent research: an EJPR study of technocracy, populism and trust in international organisations (van der Veer & Onderco, online 30 Sep 2025) treats populist attitudes as a conditioning variable rather than the outcome, so it is noted here but excluded from the shortlist — cambridge.org.

Row by row

Article · journal · date	Data / sample	Design	Principal quantitative result	Source

Curated evidence review, 3 September 2026. 14 candidate URLs fetched; 13 succeeded; 10 passed the strict topical, journal and date-quality screen. Dates shown are first-online where available (Plutopopulism: online 2 Apr 2025, APSR vol. 120, 2026; the BJPolS globalization paper: online 29 Apr 2026 per page metadata, manuscript accepted 20 Mar 2026); where only a year is reported, no day is shown or invented. Cut for space: a null extraction for a machine-learning populism index (EJPE 2024) and a 15-country populist-framing experiment whose 2026 page date is a republication artifact of older content. Numbers are as reported by the articles; units named per estimate (percentage points, odds, standard deviations, reais).

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