Water and sanitation utilities in Africa operate in a high-cost environment. They also have a mandate to at least partially recover their costs of operations and maintenance (O&M). As a result, water tariffs are higher than in other regions of the world. The increasing block tariff (IBT) is the...

The authors document the vast expansion of schooling over the past several decades, as well as convergence in schooling measures across countries. They make the observation that poor countries today have higher average education levels than countries at the same level of economic development had...

Inequality between world citizens in mid-19th century was such that at least a half of it could be explained by income differences between workers and capital-owners in individual countries. Real income of workers in most countries was similar and low. This was the basis on which Marxism built...

Why do groups want to secede and where are we most likely to see demands for self-determination? This paper proposes an economic explanation whereby a tradeoff between income and sovereignty implies that, other things being equal, richer regions are more likely to want more autonomy and conflict...

New data derived directly from household surveys are used to examine the effects of globalization on income distribution in poor and rich countries. The article looks at the impact of openness and of direct foreign investment on relative income shares across the entire income distribution. It...

Capital in the Twenty-First Century by Thomas Piketty provides a unified theory of the functioning of the capitalist economy by linking theories of economic growth and functional and personal income distributions. It argues, based on the long-run historical data series, that the forces of...

Suppose that all people in the world are allocated only two characteristics over which they have (almost) no control: country of residence and income distribution within that country. Assume further that there is no migration. We show that more than one-half of variability in income of world...

Using social tables, the author makes an estimate of global inequality (inequality among world citizens) in the early 19th century. The analysis shows that the level and composition of global inequality have changed over the past two centuries. The level has increased, reaching a high plateau...

The results of new direct price level comparisons across 148 countries in 2005 have led to large revisions of purchasing power parity exchanges rates, particularly for China and India. The recalculation of international and global inequalities, using the new purchasing power parity rates, shows...

This paper discusses and assesses critiques of the aurhor's reformulation of the median voter hypothesis and its testing. The author rephrases and redefines more correctly the redistribution hypothesis and clarifies its relationship with the median voter hypothesis. He also reviews four types of...