Aaron Tornell

Andrés Velasco

We present a standard intertemporal model in which fiscal policy is determined by an optimizing but non-benevolent fiscal authority. If the fiscal authority is impatient, a money-based stabilization provides more fiscal discipline and higher welfare for the representative agent than does an exchange rate-based stabilization. Data for Latin American stabilizations in the last quarter-century seem to confirm the notion that stabilizing by using money rather than the exchange rate helps induce politicians to reduce the fiscal deficit.

Money-based Versus Exchange Rate-based Stabilization with Endogenous Fiscal Policy

Aaron Tornell Frymerman

Frank Westermann

Analysis and evidence of how the factors that give rise to boom-bust cycles in fast-growing developing economies also enhance long-run growth. The volatility that has hit many middle-income countries (MICs) after liberalizing their financial markets has prompted critics to call for new policies to stabilize these boom-bust cycles. But, as Aaron Tornell and Frank Westermann point out in this book, over the last two decades most of the developing countries that have experienced lending booms and busts have also exhibited the fastest growth among MICs. Countries with more stable credit growth, by contrast, have exhibited, on average, lower growth rates. Factors that contribute to financial fragility thus appear, paradoxically, to be a source of long-run growth as well. Tornell and Westermann analyze boom-bust cycles in the developing world and discuss how these cycles are generated by credit market imperfections. They explain why the financial liberalization that allows countries to overcome imperfections impeding rapid growth also generates the financial fragility that leads to greater volatility and occasional crises. The conceptual framework they present illustrates this linkage and allows Tornell and Westermann to address normative questions regarding liberalization policies.The authors also characterize key macroeconomic regularities observed across MICs, showing that credit markets play a key role not only in boom-bust episodes but in the strong "credit channel" observed during tranquil times. A theoretical framework is then presented that explains how credit market imperfections can account for these empirical patterns. Finally, Tornell and Westermann provide microeconomic evidence on the credit market imperfections that drive the results of the theoretical framework, finding that asymmetries between tradables and nontradables are key to understanding the patterns in MIC data.

Boom-bust Cycles and Financial Liberalization

Mr.Athanasios Vamvakidis

Mr.Romain Ranciere

This paper constructs a new measure of currency mismatch in the banking sector that controls for bank lending to unhedged borrowers. This measure explicitly takes into account the indirect exchange rate risk that banks undertake when they lend to borrowers that will not be able to repay in the event of a sharp depreciation. Such systemic risk taking is not captured by indicators that are based only on banks’ balance sheet data. The new measure is constructed for 10 emerging European economies and for a broader sample that includes 19 additional emerging economies, for the period 1998 - 2008. Comparisons with previous currency mismatch measures that do not adjust for unhedged foreign currency borrowing illustrate the advantages of the new approach. In particular, the new measure flagged the indirect currency mismatch vulnerabilities that were building up in a number of emerging economies before the recent global crisis. Measuring currency mismatch more accurately can help country authorities in their efforts to address vulnerabilities at the right time, avoiding hurting growth prospects.

Aaron Tornell

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