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This paper links microeconomic rigidities and technological adoption to propose a partial explanation for the observed differences in income per capita across countries. The paper first presents a neoclassical general equilibrium model with heterogeneous production units. It assumes that developing countries do not generate frontier technologies but can adopt them by investing in new capital, which requires firm renewal. The model analyzes how this process can be hindered by barriers to the entry of new investment projects and the exit of obsolete ones. It finds that there are nonlinearities in the way entry and exit barriers operate: Barriers have increasing costs, and they reinforce each other's negative impact. The paper then calibrates and simulates the model to measure the impact of these barriers on the GDP per capita gap between the United States and a large sample of developing countries. It accounts for a range of 26 to 60% of the income gap between the United States and 107 developing countries. Most importantly, the model implies that, for the median developing economy, about 50% of the simulated gap is explained by the interaction of entry and exit barriers (and the rest by their individual effects). The paper's main policy implication is that only comprehensive reforms can have substantial effects, especially when initial distortions are large. If they are too narrow (focusing on only one barrier) or too mild (leaving in place a large distortion), microeconomic reforms are unlikely to have significant effects on aggregate productivity and output growth. [ABSTRACT FROM AUTHOR]

Using an event-study methodology, the article analyzes the aftermath of civil war in a cross-section of countries. It focuses on cases where the end of conflict marks the beginning of relatively lasting peace. The analysis considers 41 countries involved in internal wars over the period 1960-2003. To provide a comprehensive evaluation of the aftermath of war, a range of social areas is considered: basic indicators of economic performance, health and education, political development, demographic trends, and conflict and security issues. For each indicator the post- and pre-war situations are compared and their dynamic trends during the post-conflict period are examined. The analysis is conducted in both absolute terms and relative to control groups of countries that are similar except for conflict. The findings indicate that even though war has devastating effects and its aftermath can be immensely difficult, when the end of war marks the beginning of lasting peace, recovery and improvement are achieved. [ABSTRACT FROM AUTHOR]

Macroeconomic volatility, both a source and a reflection of underdevelopment, is a fundamental concern for developing countries. Their high aggregate instability results from a combination of large external shocks, volatile macroeconomic policies, microeconomic rigidities, and weak institutions. Volatility entails a direct welfare cost for risk-averse individuals, as well as an indirect one through its adverse effect on income growth and development. This article provides a brief overview of the recent literature on macroeconomic volatility in developing countries, highlighting its causes, consequences, and possible remedies. It then introduces the contributions of a recent conference on the subject, sponsored by the World Bank and Pompeu Fabra University, Barcelona. [ABSTRACT FROM AUTHOR]

This article examines empirically how domestic structural characteristics related to openness and product- and factor-market flexibility influence the impact of terms of trade shocks on aggregate output. Applying semistructural vector autoregressions to a panel of 88 countries with annual observations for the period 1974-2000, the analysis isolates and standardizes the shocks, estimates their impact on GDP, and examines how this impact depends on the domestic conditions outlined above. The article finds that greater trade openness magnifies the output impact of terms of trade shocks, particularly negative ones, while financial openness reduces their impact. Flexibility of labor and firm-entry are beneficial, with labor flexibility dampening the impact of negative shocks and ease of firm-entry magnifying positive ones only. Domestic financial depth has a more nuanced role in stabilizing the economy. Analysis of interactions across structural determinants reveals complementarities among macroeconomic conditions (trade and financial openness and depth) and, separately, among microeconomic conditions (flexibility of labor markets and ease of firm-entry). Variables across these groups tend to behave as substitutes for each other. [ABSTRACT FROM AUTHOR]