Paul R. Krugman

Marc J. Melitz

Maurice Obstfeld

Rev. ed. of: International economics: theory and policy / Paul Krugman, Maurice Obstfeld. 8th ed.

Theory & Policy

International Economics

Krugman and Obstfeld provide a unified model of open-economy macroeconomics based upon an asset-market approach to exchange rate determination with a central role for expectations. This ninth edition integrates research, data and policy in hot topics such as outsourcing, geographic geography and financial derivatives.

Fabio Ghironi

"We develop a stochastic, general equilibrium, two-country model of trade and macroeconomic dynamics. Productivity differs across individual, monopolistically competitive firms in each country. Firms face a sunk entry cost in the domestic market and both fixed and per-unit export costs. Only relatively more productive firms export. Exogenous shocks to aggregate productivity and entry or trade costs induce firms to enter and exit both their domestic and export markets, thus altering the composition of consumption baskets across countries over time. In a world of flexible prices, our model generates endogenously persistent deviations from PPP that would not exist absent our microeconomic structure with heterogeneous firms. It provides an endogenous, microfounded explanation for a Harrod-Balassa-Samuelson effect in response to aggregate productivity differentials and deregulation. Finally, the model successfully matches several moments of U.S. and international business cycles"--NBER website

Marc J. Melitz

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