Was the Euro-Mediterranean region at the time of the Roman empire and its Western successor states, more unequal than the European Union is today? We use some scant evidence on personal income distribution within the Empire and differences in average regional incomes to conclude that the Empire...

Thomas Piketty's "Capital in the 21st century" may be one of the most important recent economics books. It jointly treats theory of growth, functional distribution of income, and interpersonal income inequality. It envisages a future of relatively slow growth with the rising share of capital...

Using social tables, we make an estimate of global inequality (inequality among world citizens) in early 19th century. We then show that the level and composition of global inequality have changed over the last two centuries. The level has increased reaching a high plateau around 1950s, and the...

The results of new direct price level comparisons across 146 countries in 2005 have led to large revisions of PPP (purchasing power parity) exchanges rates, particularly for China and India. The recalculation of international and global inequalities, using the new PPPs, shows that inequalities...

Suppose that all people in the world are allocated only two characteristics: country where they live and social class within that country. Assume further that there is no migration. We show that 90 percent of variability in people’s global income position (percentile in world income...

Using for the first time survey data from 26 post-Communist countries, covering the period 1990-2005, the paper examines correlates of unprecedented increases in inequality registered by most of these economies. We find that, after controlling for country-fixed effects and type of survey used,...

Using household surveys from Yemen and Djibouti, the paper analyzes determinants of qat consumptions in two countries. The results confirm huge importance of qat in daily life: with between one-half (in Djibouti) and 70 percent (in Yemen) of all households reporting at least one user. But in...

Global inequality between world citizens, using the new PPP data (just published as part of the 2005 ICP), is estimated to be about 70 Gini points. This is some 4-5 Gini points higher than previously thought. The increases are even greater if one uses the Theil index.

Is inequality largely the result of the Industrial Revolution? Or, were pre-industrial incomes and life expectancies as unequal as they are today? For want of sufficient data, these questions have not yet been answered. This paper infers inequality for 14 ancient, pre-industrial societies using...

We develop and implement a method for measuring the frequency of changes in power among distinct leaders and ideologically distinct parties that is comparable across political systems. We find that more frequent alternation in power is associated with the emergence of better governance in...