We propose new methods to model behavior and conduct welfare analysis in complex environments where some choices are unlikely to reveal preferences. We develop a mixture-of-experts model that incorporates heterogeneity in consumers' preferences and in their choice processes. We also develop a...

We present a dynamic life-cycle model of demand for owner-occupied housing, investment property and liquid assets. Households face transaction costs, downpayment requirements, liquidity constraints, and tax preferences for owner-occupied housing. The model replicates key facts about home...

In the 1960 cohort, American men and women graduated from college at similar rates, and this was true for Whites, Blacks and Hispanics. But in more recent cohorts, women graduate at much higher rates than men. Gaps between race/ethnic groups have also widened. To understand these patterns, we...

Two central insights from the Schumpeterian approach to innovation and growth are that the pace of innovation is endogenously determined by the expectation of future profits and that growth is inherently a process of creative destruction. As international trade is a key determinant of firm...

We decompose the "China shock" into two components that induce different adjustments for firms exposed to Chinese exports: a horizontal shock affecting firms selling goods that compete with similar imported Chinese goods, and a vertical shock affecting firms using inputs similar to the imported...

This chapter was prepared for the Handbook of International Economics (Vol. 5) edited by Gita Gopinath, Elhanan Helpman, and Kenneth Rogoff. We provide a review of the recent literature -- both theoretical and empirical -- analyzing the multi-dimensional connections between globalization and...

The response of entry and exit to adverse supply shocks, such as COVID-19, is amplified by nominal rigidities. This leads to further amplification in the response of aggregate demand. Firms' inability to adjust their prices induces further changes in profitability that engender additional...

We show that endogenous firm selection provides a new welfare margin for heterogeneous firm models of trade (relative to homogeneous firm models). Under some parameter restrictions, the trade elasticity is constant and is a sufficient statistic for welfare, along with the domestic trade share....

We study the resource allocation decisions of U.S. multinational corporations (MNCs). We examine how established MNCs grow across countries and how firm-specific resources and host country financial-market development influence MNC growth. We find evidence of intra-firm trade-offs to growth in...

We develop a simple model of international trade with heterogeneous firms that is consistent with a number of stylized features of the data. In particular, the model predicts positive as well as zero trade flows across pairs of countries, and it allows the number of exporting firms to vary...