TY - JOUR AU - Corsetti,Giancarlo AU - Martin,Philippe AU - Pesenti,Paolo A. TI - Productivity Spillovers, Terms of Trade and the "Home Market Effect" JF - National Bureau of Economic Research Working Paper Series VL - No. 11165 PY - 2005 Y2 - March 2005 UR - http://www.nber.org/papers/w11165 L1 - http://www.nber.org/papers/w11165.pdf N1 - Author contact info: Giancarlo Corsetti Faculty of Economics Cambridge University Sidgwick Avenue CB3 9DD Cambridge, Cambs United Kingdom Tel: +44(0)1223335235 E-Mail: giancarlo.corsetti@gmail.com Philippe Martin Sciences Po 27, rue Saint-Guillaume 75007 Paris France E-Mail: philippe.martin@sciences-po.fr Paolo A. Pesenti Federal Reserve Bank of New York 33 Liberty Street New York, NY 10045 Tel: 212/720-5493 Fax: 212/720-6831 E-Mail: paolo.pesenti@ny.frb.org AB - This paper analyzes the welfare implications of international spillovers related to productivity gains, changes in market size, or government spending. We introduce trade costs and endogenous varieties in a two-country general-equilibrium model with monopolistic competition, drawing a distinction between productivity gains that enhance manufacturing efficiency, and gains that lower the cost of firms' entry and product differentiation. Our model suggests that countries with lower manufacturing costs have higher GDP but supply a smaller number of goods at a lower international price. Countries with lower entry and differentiation costs also have higher GDP, but supply a larger array of goods at improved terms of trade. The sign of the international welfare spillovers depends on terms of trade, but also on consumers' taste for variety. Higher domestic demand has macroeconomic implications that are similar to those of a reduction in firms' entry costs. ER -