After the currency crises of 1994-2001, and especially the East Asia crises of 1997-98, a lot of research investigated what countries could do to protect themselves against a future repeat. More importantly, policy makers in emerging markets took some serious measures. Some countries abandoned exchange rate targets and began to float. Many accumulated high levels of foreign exchange reserves. Many moved away from dollar-denominated debt, toward other kinds of capital inflow that would be less vulnerable to currency mismatch, such as domestic currency debt or Foreign Direct Investment. Some instituted Collective Action Clauses in their debt contracts to facilitate otherwise-messy restructuring of debt in the event of a severe negative shock. A few raised reserve requirements or otherwise tightened prudential banking regulations (clearly not enough, in retrospect). And so on.