To come up with a theory that explains inequality and that has common application across many countries, we need measurements of inequality across countries and through time that are reasonably comprehensive and reasonably reliable — and this is a major challenge. For most countries in the...

Year-to-year economy-wide measures of income distribution, such as the Gini coefficient, are rarely available for long periods except in a few developed countries, and as a result few analyses of year-to-year changes in inequality exist. But wage and earnings data by industrial sectors are...

The deficiencies of the Deininger and Squire data set on household income inequality are well known to include sparse coverage, problematic measurements, and the combination of diverse data types into a single data set. Yet many studies have relied on this data due to the lack of available...