In a world of high capital mobility, the threat of speculative attack becom
es a central issue of macroeconomic policy. While "first-generation" and "s
econd-generation" models of speculative attacks both have considerable rele
vance to particular financial crises of the 1990s, a "third-generation" mod
el is needed to make sense of the number and nature of the emerging market
crises of 1997-98. Most of the recent attempts to produce such a model have
argued that the core of the problem lies in the banking system. This paper
sketches another candidate for third-generation crisis modeling-one that e
mphasizes two facts that have been omitted from formal models to date: the
role of companies' balance sheets in determining their ability to invest, a
nd that of capital flows in affecting the real exchange rate.