Working Papers
2007
April 1, 2007
Interest Rate Spreads in English-Speaking African Countries
Description: This paper examines interest rate spreads in English-speaking African countries. Higher spreads were found to be associated with lower inflation, a greater number of banks, and greater public ownership of banks. Higher deposit interest rates were found to be associated with lower interest rate spreads, but higher net interest margins. A large increase in spreads in the late 1980s and 1990s may be explained by a strengthening of financial sector supervision. Limited data suggested that poor governance, weak regulatory frameworks and property rights, and higher required reserve ratios are associated with higher spreads.
April 1, 2007
Lessons From High Inflation Epidsodes for Stabilizing the Economy in Zimbabwe
Description: Zimbabwe has currently the highest rate of inflation in the world (an annual rate of 1,730 percent in February, 2007). The high rates of inflation have contributed to the contraction of the economy, which has declined by about 30 percent since 1999. This paper examines the stabilization experience of countries that experienced similar rates of inflation (above 1,000 percent) during 1980-2005 and draws lessons for Zimbabwe. First, with appropriate stabilization policies, the fall in inflation can be very rapid and output normally recovers within the first year or two of stabilization. Second, while reforms need to be comprehensive, a strong upfront fiscal consolidation, including elimination of quasi-fiscal activities, is a critical element of a successful stabilization program. Third, although stabilization itself can be done without significant external financing in the first year, most countries benefited from external policy advice and technical support, including from the IMF, during stabilization and from an increase in financial assistance in subsequent years.
April 1, 2007
Central Bank Quasi-Fiscal Losses and High Inflation in Zimbabwe: A Note
Description: Zimbabwe's failure to address continuing central bank quasi-fiscal losses has interfered with both monetary management and the independence and credibility of the Reserve Bank of Zimbabwe (RBZ). Realized quasi-fiscal losses are estimated to have amounted to about 75 percent of GDP in 2006. Because they were financed by creating money creation or issuing RBZ securities, they contributed to the four-digit inflation reached in 2006. The remedy for the current situation is clearly to eliminate the causes of losses by implementing measures to improve the cash-flow of the bank and restore its financial position.
April 1, 2007
Looking Beyond the Fiscal: Do Oil Funds Bring Macroeconomic Stability?
Description: Oil funds have become increasingly popular in oil exporting countries during the recent surge in oil prices. However, the literature on the contribution is small, tends to focus narrowly on their fiscal benefits, and concludes that they are redundant of such funds-in other words, that well designed fiscal management and policy are adequate substitutes for oil funds. This paper argues that a broader focus is needed in judging the effectiveness of such funds. We test whether oil funds help reduce macroeconomic volatility. The econometric estimation results from a 30-year panel data set of 15 countries with and without oil funds suggest that oil funds are associated with reduced volatility of broad money and prices and lower inflation. However, there is a statistically weak negative association between the presence of an oil fund and volatility of the real exchange rate.
April 1, 2007
Dynamic Incentives and the Optimal Delegation of Political Power
Description: This paper proposes a theory to explain why a politician delegates policy tasks to a technocrat in an independent institution. It formalizes the rationales for delegation highlighted by Hamilton (1788) and by Blinder (1998). Delegation trades-off the cost of having a possibly incompetent technocrat with a long-term job contract against the benefit of having a technocrat who (i) invests more effort into the specialized policy task and (ii) is better insulated from the whims of public opinion. One natural application of the theory is in the field of monetary policy where the model provides a new theory of central bank independence.
April 1, 2007
Land Distribution and Financial System Development
Description: Research on credit markets from developing economies, as well as work on the origin of institutions in general, has suggested that land inequality may play a role in determining financial development. In this paper we establish empirically that initial land inequality is a significant predictor of financial depth across countries, even while controlling for other predictors such as legal origin, ethnic fractionalization, and income inequality. To examine this relationship we have created a new measure of land distribution within countries that builds upon the work of Deininger and Squire (1998) by explicitly accounting for landlessness. In addition to being a significant predictor of financial development, land inequality is found to be uncorrelated with other fundamental characteristics of economies, suggesting its possible use in a wider range of research.
April 1, 2007
A Theory of “Crying Wolf”: The Economics of Money Laundering Enforcement
Description: The paper shows how excessive reporting, called "crying wolf", can dilute the information value of reports. Excessive reporting is investigated by undertaking the first formal analysis of money laundering enforcement. Banks monitor transactions and report suspicious activity to government agencies, which use these reports to identify investigation targets. Banks face fines should they fail to report money laundering. However, excessive fines force banks to report transactions which are less suspicious. The empirical evidence is shown to be consistent with the model's predictions. The model is used to suggest implementable corrective policy measures, such as decreasing fines and introducing reporting fees.
April 1, 2007
Catch-Up Growth, Habits, Oil Depletion, and Fiscal Policy: Lessons from the Republic of Congo
Description: In a number of oil producing countries, oil revenue accounts for the majority of government revenue, but is expected to be depleted in a relatively short time frame. Ensuring that fiscal policy is on a sustainable path is thus a high priority, but political and social adjustment costs create incentives to delay fiscal consolidation. This paper estimates how the permanently sustainable non-oil primary deficit (PSNOPD) depends on the speed of consolidation, using an optimization model with habit formation. Realism is added by allowing for negative growth-adjusted interest rates during a temporary period of catch-up growth. Applied to the Republic of Congo, this approach leads to the following conclusions: (i) the current fiscalpolicy stance is unsustainable; (ii) social adjustment costs justify spreading the bulk of the adjustment over five years; and (iii) the slower the adjustment, the lower the PSNOPD level.
April 1, 2007
Flattening of the Phillips Curve: Implications for Monetary Policy
Description: Over the past decade, inflation has become less responsive to domestic demand pressures in many industrial countries. This development has been attributed, in part, to globalization forces. A small macroeconomic model, estimated on UK data using Bayesian estimation, is used to analyze the monetary policy implications of this structural change. The focus is on the implications of a globalization-related flattening of the Phillips curve for the trade-off between inflation and output gap variability and for the efficient monetary policy response rule.
April 1, 2007
Contagion Risk in the International Banking System and Implications for London As a Global Financial Center
Description: In this paper, we use the extreme value theory (EVT) framework to analyze contagion risk across the international banking system. We test for the likelihood that an extreme shock affecting a major, systemic U.K. bank would also affect another large local or foreign counterpart, and vice-versa. Our results reveal several key trends among major global banks: contagion risk among banks exhibits "home bias"; individual banks are affected differently by idiosyncratic shocks to their major counterparts; and banks are affected differently by common shocks to the real economy or financial markets. In general, bank soundness appears more susceptible to common (macro and market) shocks when the global environment is turbulent; this may have important implications for London as a major financial services and capital markets hub.