Book Reviews

Official Reserves and Currency Management in Asia: Myth, Reality and the Future: Geneva Reports on the World Economy 7 by HANS GENBERG, ROBERT McCAULEY, YUNG CHUL PARK and AVINASH PERSAUD (London: Centre for Economic Policy Research, 2005), pp. 128, £25.00 paperback, ISBN 1 898128 90 1. Growth, Inequality and Poverty: Prospects for Pro‐Poor Economic Development by ANTHONY SHORROCKS and ROLPH VAN DER HOEVEN (eds.) (Oxford: Oxford University Press, 2005), pp. 283, paperback, ISBN 0 19 928824 2. Competition and Growth: Reconciling Theory and Evidence by PHILIPPE AGHION and RACHEL GRIFFITH (Cambridge, MA: MIT Press, 2005), pp. 104, £18.50 hardback, ISBN 0 262 01218 9. The World Trade Organization. A Very Short Introduction by AMRITA NARLIKAR (Oxford: Oxford University Press, 2005), pp. 175, £6.99, paperback, ISBN 0 19 280608 4.     

Sovereign Credit Risk,Banks' Government Support,and Bank Stock Returns around the World

We explore the joint effect of expected government support to banks and changes in sovereign credit ratings on bank stock returns using data for banks in 37 countries between 1995 and 2011. We find that sovereign credit rating downgrades have a large negative effect on bank stock returns for those banks that are expected to receive stronger support from their governments. This result is stronger for banks in advanced economies where governments are better positioned to provide that support. Our results suggest that stock market investors perceive sovereigns and domestic banks as markedly interconnected, partly through government guarantees.     

Monetary Regime Switches and Central Bank Preferences

Monetary policy objectives and targets are not necessarily constant over time. The regime‐switching literature has typically analyzed and interpreted changes in policymakers' behavior through simple interest rate rules. This paper analyzes policy regime switches by explicitly modeling policymakers' behavior and objectives. We show that changes in the parameters of simple rules do not necessarily correspond to changes in policymakers' preferences. In fact, capturing and interpreting regime changes in preferences through interest rate rules can lead to misleading results.     

Fire Sales in a Model of Complexity

We present a model of financial crises that stem from endogenous complexity. We conceptualize complexity as banks' uncertainty about the financial network of cross exposures. As conditions deteriorate, cross exposures generate the possibility of a domino effect of bankruptcies. As this happens, banks face an increasingly complex environment since they need to understand a greater fraction of the financial network to assess their own financial health. Complexity dramatically amplifies banks' perceived counterparty risk, and makes relatively healthy banks reluctant to buy risky assets. The model also features a novel complexity externality.