"The authors examine the price linkages among polyester (the dominant chemical fiber), cotton (the dominant natural fiber), and crude oil (the dominant energy commodity), based on monthly data between 1980 and 2002. The modeling framework incorporates several aspects of the unit root...

"Oil and mineral revenues raise national savings and hence facilitate investment, capital accumulation, and sustained growth; thus, there are benefits of owning large natural resources. There can be a significant spillover effect from the oil sector to the non-oil sector particularly if...

"A family preference for sons over daughters may manifest itself in different ways, including higher mortality, worse health status, or lower educational attainment among girls. This study focuses on one measure of son preference in the developing world, namely the likelihood of continued...

"The paper presents a major overhaul to the World Bank's past estimates of global poverty, incorporating new and better data. Extreme poverty-as judged by what "poverty" means in the world's poorest countries-is found to be more pervasive than we thought. Yet the data also provide robust...

"Impact evaluations aim to measure the outcomes that can be attributed to a specific policy or intervention. Although there have been excellent reviews of the different methods that an evaluator can choose in order to estimate impact, there has not been sufficient attention given to questions...

"In many developing countries, achieving the Millennium Development Goals (MDGs) by 2015 will require significant increases in expenditures on social services and in foreign assistance. It will also require careful planning of the sector allocation and sequencing of public spending. Especially...

"The rapid rise in food prices has been a burden on the poor in developing countries, who spend roughly half of their household incomes on food. This paper examines the factors behind the rapid increase in internationally traded food prices since 2002 and estimates the contribution of various...

"According to Vietnamese astrology, dates of birth are believed to be determinants of success, luck, character, and good match between individuals. But how far does this go? To document the influence of superstition on individuals' behavior, the authors examine fertility decisions made in...