Export activity shapes workers’ experience-wage profiles. Using employer-employee and customs data for Brazilian manufacturing, we document that workers’ experience-wage profiles are steeper at exporters than at non-exporters and, among exporters, steeper at exporters shipping to high-income destinations. We develop and quantify a model featuring worker-firm wage bargaining, export-market entry by multi-worker firms, and human capital accumulation by workers to interpret the data. Human capital growth can explain one-half of the differences in wage profiles between exporters and non-exporters. We show that increased human capital per worker can account for one-half of the overall gains in real income from trade openness.

While neoclassical theory emphasizes the impact of trade on wage inequality between occupations and sectors, more recent theories of firm heterogeneity point to the impact of trade on wage dispersion within occupations and sectors. Using linked employer–employee data for Brazil, we show that much of overall wage inequality arises within sector–occupations and for workers with similar observable characteristics; this within component is driven by wage dispersion between firms; and wage dispersion between firms is related to firm employment size and trade participation. We then extend the heterogenous-firm model of trade and inequality from Helpman et al. (2010) and estimate it with Brazilian data. We show that the estimated model provides a close approximation to the observed distribution of wages and employment. We use the estimated model to undertake counterfactuals, in which we find sizable effects of trade on wage inequality.