83: Tariffs for Sale and Identity Politics

Episode Summary

Executive Summary: The episode explains the political economy of tariffs: why protectionism persists despite economists’ free-trade preferences. Grossman contrasts demand-side drivers (voter self-interest, income distribution, industry/skill exposure) with supply-side drivers (politicians seeking votes, money, and information). The conversation then moves from the median-voter model to lobbying and campaign contributions, and finally to newer identity-based theories that may help explain recent anti-trade backlash and tariff politics.

Main Topics: Why political economy is needed for trade policy (Priority: 5/5): Grossman argues that standard welfare economics predicts policies that maximize national efficiency, but actual trade policies are shaped by political incentives, so economists must explain the policies that really emerge. Demand for protectionism among voters (Priority: 5/5): Voters respond to how trade affects their personal income, consumption prices, job security, industry affiliation, and skill level. Trade preferences differ across workers and sectors. Median voter theory and its limits (Priority: 4/5): The median voter model explains protectionist pressure in democracies, but it oversimplifies trade as a one-dimensional issue and struggles to explain variation across countries and industries. Lobbying, campaign contributions, and 'Protection for Sale' (Priority: 5/5): Interest groups influence policy through money and resources, pushing politicians to support tariffs in exchange for contributions. Grossman describes this as a 'bang-for-buck' political exchange. Trade liberalization and export interests (Priority: 4/5): Trade opening is partly explained by exporters using domestic political channels to seek foreign market access, counterbalancing import-competing industries that favor protection. Identity, polarization, and the new backlash to trade (Priority: 5/5): Grossman’s more recent work suggests changing social identity and cognitive dissonance can rapidly shift trade preferences, potentially helping explain the political reversal against globalization and tariffs linked to race and class. Limits and future of trade-politics modeling (Priority: 4/5): He argues economics should incorporate insights from sociology and social psychology, even if doing so reduces the neatness of standard rational-choice models.

Key Arguments: Trade policy needs a political economy theory because observed policies differ from the efficiency-maximizing policies taught in standard economics. Voters support protectionism when it helps their own income or jobs and does not sharply raise consumer prices. Trade preferences vary by industry and occupation; workers in import-competing sectors and less-skilled workers are generally more protectionist. The median voter is usually not the average voter because wealth and skill are unevenly distributed; this makes protectionist outcomes more likely in rich democracies. The median voter model is useful but too simple because trade policy has many dimensions and sits alongside many other political issues. Lobbying matters because politicians need both campaign resources and information; trade policy can be shaped by quid-pro-quo exchanges with interest groups. Grossman’s 'Protection for Sale' framework predicts which industries get higher tariffs based on political return per unit of voter harm. Empirical tests broadly support the pattern that protected industries are those the model predicts, though the evidence suggests politicians may care more about public-mindedness than the original model assumed. Trade liberalization was helped by export industries that lobbied for foreign market access through their own governments. Recent trade backlash may be better explained by identity shifts, widening inequality, and social polarization than by traditional income-based models alone. As people identify more with ethnic, racial, or class groups, their policy preferences can change quickly, including their stance on tariffs and globalization. Economics should borrow more from sociology and social psychology to model how people form preferences, especially political ones.

Data Points: Timeframe: early 1990s - Grossman refers to his and others’ foundational political-economy papers on trade policy, including 'Protection for Sale'. Literature age: a couple of decades old - The hosts note that much of the core political-economy trade literature discussed is several decades old. Policy dimensions: many - Grossman says trade policy is not just one issue; it covers tariffs across steel, textiles, and more, making simple median-voter models difficult. Industry examples: steel, autos, aircraft, computers - Used to illustrate differences between import-competing and export-oriented industries. Worker examples: blue-collar vs white-collar; Wall Street vs Main Street - Used to illustrate occupational and skill-based differences in trade preferences. Countries mentioned: United States, Western Europe, China, Mexico - Used in discussing median-voter predictions and the surprising demand for protection even in exporting, labor-abundant countries. Model conclusion: higher tariffs in industries where political returns are greatest - Grossman summarizes the 'bang-for-buck' logic of the Protection for Sale framework. Political economy tradeoff: support industries where voters are hurt least and contributions are highest - Describes the model’s prediction of tariff-setting behavior.

Pivotal Quotes: "Why do we need a political economic theory of trade policy?" — Samaya Keynes: Opening question framing the episode’s central theme. "The political economy approach thinks about the political actors... and tries to think about how interactions between them in a political realm determine a policy" — Jean Grossman: Defines political economy as an approach to trade policy formation. "We wrote down a model which sordidly, if you will, captures the notion that interest groups confront politicians with offers that say, Scratch my back, and I'll scratch your back." — Jean Grossman: Explains the logic behind lobbying and 'Protection for Sale'.

Implications: Tariffs are not just economic instruments; they reflect voter incentives, lobbying, and identity politics. Listeners should expect future trade conflicts to hinge less on efficiency and more on polarization, coalition-building, and how people define themselves.