The literature on populism is divided on whether economic factors are significant and robust causes of populism. To clarify this, we performed the first systematic review and meta-analysis of the evidence of a causal association between economic insecurity and populism. We combined database searches with searching the citations of eligible studies and recently published reviews. We identified and reviewed thirty-six studies and presented a concise narrative summary and numerical synthesis of the key findings. Although we found significant heterogeneity in several dimensions, all studies reported a significant causal association. A recurrent magnitude was that economic insecurity explained around one-third of recent surges in populism. We tested for publication bias by conducting a funnel-plot asymmetry test and a density discontinuity test of the distribution of t-statistics. We found significant evidence of publication bias; however, the causal association between economic insecurity and populism remains significant after controlling for it.

Intense debate surrounds the effects of trade on voting, yet less attention has been paid to how fluctuations in the real exchange rate may influence elections. A moderately overvalued currency enhances consumers’ purchasing power, yet extreme overvaluation threatens exports and economic growth. We therefore expect exchange rates to have a conditional effect on elections: when a currency is undervalued, voters will punish incumbents for further depreciations; yet when it is highly overvalued, they may reward incumbents for depreciation. We empirically explore our argument in three steps. First, we examine up to 412 elections in up to 59 democratic countries and show that voters generally punish depreciation in the real exchange rate when the currency is undervalued. We also find that at extremely high levels of currency overvaluation, voters sometimes reward incumbents for depreciation. A currency peg, especially in the eurozone, appears to insulate incumbents from these effects. In a second step, we explore the microfoundations of the election results through survey experiments in three advanced industrialized and two emerging market nations with different monetary and exchange rate policies and institutions. Respondents in countries with undervalued to mildly overvalued currencies disapprove of currency depreciations, whereas those facing a very highly overvalued currency favor depreciation. Third, we examine the mechanism of political competition in exchange rate policymaking and demonstrate that sustained undervaluation is rare in countries with strong political competition. Democratic governments have electoral incentives to avoid using undervalued currencies as a means of shielding workers from import competition.

A populist backlash to globalization has ushered in nationalist governments and challenged core features of the Liberal International Order. Although startling in scope and urgency, the populist wave has been developing in declining regions of wealthy countries for some time. Trade, offshoring, and automation have steadily reduced the number of available jobs and the wages of industrial workers since at least the 1970s. The decline in manufacturing employment initiated the deterioration of social and economic conditions in affected communities, exacerbating inequalities between depressed rural areas and small cities and towns, on the one hand, and thriving cities, on the other. The global financial crisis of 2008 catalyzed these divisions, as communities already in decline suffered deeper and longer economic downturns than metropolitan areas, where superstar knowledge, technology, and service-oriented firms agglomerate. We document many of these trends across the United States and Europe, and demonstrate that populist support is strongest in communities that experienced long-term economic and social decline. Institutional differences in labor markets and electoral rules across developed democracies may explain some of the variation in populists’ electoral success. Renewed support for the Liberal International Order may require a rejuvenation of distressed communities and a reduction of stark regional inequalities.