Abstract
This document do not necessarily reflect the viewpoints of the IDB management or its Board ofExecutive Directors. The author is grateful for the help of Felipe Barrera and Martin Loser and comments offeredby the research team of the Office of Chief Economist. 1997Inter-American Development Bank1300 New York Avenue, N.W.Washington, D.C. 20577The views and interpretations in this document are those of the authors and should not beattributed to the Inter-American Development Bank, or to...