Do populations grow as countries become richer? In this study we estimate the effects on population growth of shocks to national income that are plausibly exogenous and unlikely to be driven by technological change. For a panel of over 139 countries spanning the period 1960–2007, we interact changes in international oil prices with countries’ average net-export shares of oil in GDP. Controlling...

population in all countries plays a fundamental role in economic growth and economic development. but besides absolute size and growth rate of population, the more important factor will be “age structure” or “age distribution” of population, because it can be as source of many economical, social, and political challenges. in this research, we investigate effect of changes in population shares i...

In this paper we draw preliminary lessons from four large, threeto five-year-long, agriculture value chain projects being implemented by DAI among smallholder farmers with varying degrees of nutrition sensitivity. The projects are located in the Democratic Republic of the Congo (DRC), Liberia, Malawi, and Tajikistan, and are supported by USAID and the U.S. Government’s Feed the Future (FTF) ini...

Abstract We construct a tractable neoclassical growth model that generates Pareto’s law of income distribution and Zipf’s law of firm size distribution from idiosyncratic, firm-level productivity shocks. CEOs invest in risk-free assets as well as their own firms’ risky stocks, through which their assets and incomes depend on firm-level shocks. Using the model, we evaluate how changes in tax rat...

There have always been differences of view on what poverty means in conceptual terms, and even greater differences on how to measure it. These differences span a broad spectrum of normative and ideological positions and raise a number of technical issues surrounding the statistical measurement of poverty. This paper explains the role of poverty research and the value of a poverty line, while ac...

Recent dramatic increases in food prices in much of the world have caused much concern, and have even resulted in some public protests and riots. This is easy to understand given the large percentages of incomes that the poor devote to food purchases. Many commentators have predicted that food supplies in the Asia-Pacific region will become much more limited in the future as the result of popul...