Electoral Reform Shifted Mexican Trade Policy Toward Local Industries

Why Institutional Change Matters

Anthony Pezzola investigates how changes in political institutions reshaped who benefits from Mexican trade policy. The article shows that the rules that link politicians to voters — especially electoral reforms that strengthen territorially specific constituencies — can redirect political protection and preferential treatment away from nationally important industries and toward firms that matter most within subnational jurisdictions.

What the Study Compares

Pezzola contrasts Mexican trade policy across two institutional settings: the earlier period in which national-level economic importance drove political clout, and the post-reform era marked by electoral restructuring and the rise of divided government. The comparison isolates how shifts in the geographic basis of political accountability alter which industries attract preferential treatment from policymakers.

How the Argument Is Made

The article uses a comparative-historical approach, tracing institutional reforms and their timing and then linking those changes to observable shifts in trade-policy outcomes and political responsiveness. Pezzola follows policy decisions, legislative incentives, and the changing incentives of officeholders to show how electoral institutions condition the mapping from constituent interests to policy favors.

Key Findings

• Electoral institutions that make politicians accountable to territorially specific constituencies increase the political salience of subnational economic interests.
• After Mexico's electoral reforms and the emergence of divided government, an industry's political clout depended much more on its importance to local or regional economies than on its national economic footprint.
• The centrifugal effects of these institutional changes reconfigured who receives protection or preferential treatment in trade policy: winners became those with concentrated local influence rather than simply large national industries.

Implications for Comparative Politics and Political Economy

The study highlights that institutional design — not only economic size or sectoral importance — shapes trade-policy outcomes. For scholars and policymakers, the Mexican case suggests that electoral reform and the distribution of governmental power can systematically redistribute political advantages across sectors by changing where politicians seek support.

Author

Anthony Pezzola, International Studies Quarterly.