This paper provides a cross-country comparison of how income inequality has evolved within countries at different levels of development. It uses overlapping nonparametric regression, which allows visual comparisons of inequality both within and across countries. As a result, the methodology...

How unequal is the world today? Is global income inequality falling, as many economists claim, or is it rising, as one often hears? This paper reviews the arguments and evidence. A number of concerns about the underlying data are identified, with biases going in both directions. Conceptual...