This article utilizes a replication exercise to evaluate the reliability of the historical time series for top income share concentrations in the United Kingdom, as presented in Thomas Piketty’s Capital in the Twenty First Century (2014). Piketty’s depiction of the top 1% and 10% wealth...

Thomas Piketty's Capital in the 21st Century has been widely debated on theoretical grounds, yet continues to attract acclaim for its historically-infused data analysis. In this study we conduct a closer scrutiny of Piketty's empirics than has appeared thus far, focusing upon his treatment of...

Long term measures of income inequality must grapple with the challenges presented by incomplete historical records. In this paper we examine one such problem affecting the quality of federal income tax return data in the period between the two World Wars, which form the basis for the widely...

We present a new series for top income concentrations in the United States, using a consistent data construction methodology for the entire range of available data. This is meant to connect efforts that have separately considered pre-1960 and post-1960 inequality measures. Our series improves...