Duncan: Great intro to the Milanovic paper, Ricardo, but there’s plenty more juice to be had, I think. First let’s take a closer look at the graph you put up of change in global real income 1988-2008 (below). As well as the spike of the top 1% (and do we know whether the financial crisis has moderated or amplified the spike?), the bit that jumps out at me is the stagnation of incomes above the 75th percentile. For that portion of the world’s population in the top quarter of the income bracket, but below the super-rich 1%, the last 20 years have been pretty terrible.
The rich in the West are getting richer. Many countries have experienced a sharp concentration of incomes over the last three decades. The top 1% of Americans have doubled their share of national income (from 8 to 17%) since Ronald Reagan was inaugurated 32 years ago – see graph, source here. The elite in other advanced economies, including, Australia, the UK, Japan and Sweden, have also gotten a larger share of the pie. We have been able to understand the concentration of incomes at the national level thanks to the study of tax records by enterprising scholars such as Emmanuel Saez, Thomas Picketty and Sir Anthony Atkinson. But until recently, we didn’t know much about the global concentration of incomes (there’s no global tax collector with a similar database).