This paper provides an overview of the recent theoretical and empirical research on herd behavior in financial markets. It looks at what precisely is meant by herding, the causes of herd behavior, the success of existing studies in identifying the phenomenon, and the effect that herding has on financial markets. The paper also surveys a selected number of studies that evaluated the demand for money using the error-correction model approach in the 1990s across a range of industrial and developing countries.

This paper discusses the origins of the pyramid schemes and the way the authorities handled them. The paper analyzes the economic effects of the pyramid schemes, concluding that despite the descent into anarchy triggered by the schemes’ collapse, their direct effects on the economy are difficult to specify and appear to have been limited. The paper also argues that prevention of pyramid schemes is better than cure and that government and international financial institutions should be vigilant in clamping down on frauds.

This paper analyzes portfolio diversification, leverage, and financial contagion. It studies the extent to which basic principles of portfolio diversification explain “contagious selling” of financial assets when there are purely local shocks. The paper demonstrates that the elementary portfolio theory offers key insights into “contagion.” Most important, portfolio diversification and leverage are sufficient to explain why an investor will find it optimal to significantly reduce all risky asset positions when an adverse shock impacts just one asset.

This last issue for 2005 comprises seven new papers, including a contribution to the journal's occasional Special Data Section about domestic debt markets in Sub-Saharan Africa, and also an in-depth look at the internal job market for entry-level economists at the IMF. The remaining articles cover toics as diverse as: modeling of asset markets, exchange rates in developing countries, international bank claims on Latin America, the effectiveness of "early warning" systems, and the use (by emerging market countries) of the IMF's Special Data Dissemination Standard (SDDS).

Studies of the impact of trade openness on growth are based either on crosscountry analysis—which lacks transparency—or case studies—which lack statistical rigor. This paper applies a transparent econometric method drawn from the treatment evaluation literature (matching estimators) to make the comparison between treated (that is, open) and control (that is, closed) countries explicit while remaining within a statistical framework. Matching estimators highlight that common cross-country evidence is based on rather far-fetched country comparisons, which stem from the lack of common support of treated and control countries in the covariate space. The paper therefore advocates paying more attention to appropriate sample restriction in crosscountry macro research.

This paper analyzes long-term exchange rate modeling. The paper reviews the literature that tests for a unit root in real exchange rates and the closely related work on testing for a unit root in the residual from a regression of the nominal exchange rate on relative prices. It argues that the balance of evidence is supportive of the existence of some form of long-term exchange rate relationship. The paper highlights that the form of this relationship, however, does not accord exactly with a traditional representation of the long-term exchange rate.

This special issue brings together world-renowned experts to provide a systematic and critical analysis of the costs and benefits of financial globalization. Contributors include Kenneth Rogoff, Maurice Obstfeld, Dani Rodrik, and Frederic S. Mishkin.

This paper introduces a new database of financial reforms covering 91 economies over 1973-2005. It describes the content of the database, the information sources utilized, and the coding rules used to create an index of financial reform. It also compares the database with other measures of financial liberalization, provides descriptive statistics, and discusses some possible applications. The database provides a multifaceted measure of reform, covering seven aspects of financial sector policy. Along each dimension the database provides a graded (rather than a binary) score, and allows for reversals.

This paper explores how fiscal policy can affect medium- to long-term growth. It identifies the main channels through which fiscal policy can influence growth and distills practical lessons for policymakers. The particular mix of policy measures, however, will depend on country-specific conditions, capacities, and preferences. The paper draws on the Fund’s extensive technical assistance on fiscal reforms as well as several analytical studies, including a novel approach for country studies, a statistical analysis of growth accelerations following fiscal reforms, and simulations of an endogenous growth model.