TY - JOUR AU - Gatti,Domenico Delli AU - Gallegati,Mauro AU - Greenwald,Bruce C. AU - Stiglitz,Joseph E. TI - Net Worth, Exchange Rates, and Monetary Policy: The Effects of a Devaluation in a Financially Fragile Environment JF - National Bureau of Economic Research Working Paper Series VL - No. 13244 PY - 2007 Y2 - July 2007 UR - http://www.nber.org/papers/w13244 L1 - http://www.nber.org/papers/w13244.pdf N1 - Author contact info: Domenico Delli Gatti Istituto di Teoria Economica Università Cattolica Largo Gemelli, 1 20123 Milano E-Mail: domenico.delligatti@unicatt.it Mauro Gallegati Dipartimento di Economia Facolta' di Economia Giorgio Fua' Universita' Politecnica delle Marche Piazzale Martelli, 8 60121 Ancona E-Mail: mauro.gallegati@univpm.it Bruce C. Greenwald Columbia University 611 Uris Hall New York, NY 10027 E-Mail: bg7@columbia.edu Joseph E. Stiglitz Uris Hall, Columbia University 3022 Broadway, Room 814 New York, NY 10027 Tel: 212/854-0671 Fax: 212/662-8474 E-Mail: jes322@columbia.edu AB - In this paper we propose an Open Economy Financial Accelerator model along the lines of Greenwald-Stiglitz (1993) close in spirit but different in many respects from the one proposed by Greenwald (1998.) The first goal of the paper is to provide a taxonomy of the effects of a devaluation in this context. The direct (first round) effect on output, taking as given net worth and interest rate, is negative for domestic firms (due to the input cost effect) and positive for exporting firms (due to a positive foreign debt effect). The indirect (second round) wealth effect (on output through net worth, taking as given the interest rate) is uncertain, depending on the relative size of the domestic and exporting firms. There is also an indirect effect on output through the response of the domestic interest rate to a devaluation due to the risk premium effect. Due to the uncertainty on the sign of most of these effects, it is difficult to assess the overall impact of a devaluation. One cannot rule out, however, an economy-wide contractionary effect of a devaluation. If the devaluation affects negatively the net worth of domestic firms, the domestic interest rate may rise (due to the risk premium effect), exerting an additional contractionary impact on output. If, on top of that, the monetary authorities force a further increase of the interest rate in an effort to curb the exchange rate, the contractionary effect will be emphasized. ER -