Paul Romer's paper "Increasing Returns and Long Run Growth" is now 15 years old. This pathbreaking contribution led to a resurgence in research on Economic Growth. The new literature has made a number of important contributions. One of the main ones, perhaps the main one, is that it has shifted...

We estimate the world distribution of income by integrating individual income distributions for 125 countries between 1970 and 1998. We estimate poverty rates and headcounts by integrating the density function below the $1/day and $2/day poverty lines. We find that poverty rates decline...

The dismal growth performance of Africa is the worst economic tragedy of the XXth century. We document the evolution of per capita GDP for the continent as a whole and for subset of countries south of the Sahara desert. We document the worsening of various income inequality indexes and we...

Many political economic theories use and emphasize the process of voting in their explanation of the growth of Social Security, government spending, and other public policies. But is there an empirical connection between democracy and Social Security program size or design? Using some new...

We use aggregate GDP data and within-country income shares for the period 1970-1998 to assign a level of income to each person in the world. We then estimate the gaussian kernel density function for the worldwide distribution of income. We compute world poverty rates by integrating the density...

166 countries have some kind of public old age pension. What economic forces create and sustain old-age Social Security as a public program? In the first part of the paper, we document some of the internationally and historically common features of Social Security programs including explicit and...

This paper analyses the economic growth performance in the Arab world over the last forty years. The Arab world has managed to reduce poverty performance despite its relatively disappointing growth performance. We relate this poor performance of both oil and non-oil producers to investment....

We propose a positive theory that is consistent with two important features of social security programs around the world: (1) they redistribute income from young to old and (2) they induce retirement. We construct a voting model that includes a "political campaign" or "debate" prior to the...

This paper follows Sala-i-Martin (2002) and estimates the distribution of income for the G20 countries for every year between 1970 and 1998. Two important aspects of the distribution are then analyzed: the poverty rates (the fraction of the G20 that earn incomes of less than 1 dollar and less...

Estimates of democracy's effect on the public sector are obtained from comparisons of 142 countries over the years 1960-90. Based on three tenets of voting theory - that voting mutes policy preference intensity, political power is equally distributed in democracies, and the form of voting...