There are problems with the data and methods Piketty used. The Wikipedia entry for the book has a summary including multiple references: https://en.wikipedia.

There are problems with the data and methods Piketty used. The Wikipedia entry for the book has a summary including multiple references: https://en.wikipedia.org/wiki/Capital_in_the_Twenty-First_Century#Criticism https://en.wikipedia.org/wiki/Capital_in_the_Twenty-First_Ce...