Worlds apart: measuring international and global inequality

The promise of the twentieth century

A topic whose time has come

I: Setting the stage

The three concepts of inequality defined

Other differences between the concepts

International and world inequality compared

II: Inequality among countries

Rising differences in per capita incomes

Regional convergence, divergence, or ... "vergence"

The shape of international GDP per capita distribution

Winners and losers: increasing dominance of the west

III: Global inequality

Concept 2 inequality: decreasing in the past twenty years

High global inequality: no trend?

A world without a middle class

IV: Concluding comments

The three concepts of inequality in historical perspective

Why does global inequality matter and what to do about it?