1. https://www.brookings.edu/articles/deciphering-the-fall-and-... (Piketty underestimates the extent to which inequality is due to real estate)
2. https://davidsplinter.com/AutenSplinter-Tax_Data_and_Inequal... (uses different -- more accurate -- methods to estimate inequality in the US since 1960 and finds that Piketty and co. overestimate the growth of inequality)
