Elhanan Helpman

Helpman, often in collaboration with Paul Krugman, revolutionized trade theory by developing models that explain intra-industry trade between similar countries—something traditional comparative advantage theory could not adequately explain. Their "new trade theory" showed how economies of scale and product differentiation create gains from trade even between nations with similar factor endowments.

With Gene Grossman and others, Helpman developed endogenous growth theory models showing how innovation, research and development, and knowledge spillovers drive long-run economic growth. Their work explained how trade can accelerate growth by expanding the market for innovations and facilitating knowledge diffusion across countries.

Helpman holds positions at both Harvard University and Tel Aviv University, maintaining active research programs at both institutions. He is also a research associate at the National Bureau of Economic Research and has been associated with the Canadian Institute for Advanced Research.

The Grossman-Helpman model, developed with Gene Grossman, analyzes how trade policy is shaped by lobbying and political pressure from different sectors. It shows how organized interest groups can influence trade protection through political contributions, providing a framework for understanding the political economy of trade policy.