Famously explored by Piketty (agree or disagree with the book, it's a treasure trove in terms of empirical data, and all data is online). http://piketty.pse.en

Famously explored by Piketty (agree or disagree with the book, it's a treasure trove in terms of empirical data, and all data is online). http://piketty.pse.ens.fr/files/capital21c/en/pdf/F6.3.pdf http://piketty.pse.ens.fr/files/capital21c/en/pdf/F6.3.pdf http://piketty.pse.ens.fr/files/capital21c/en/pdf/F10.9.pdf http://piketty.pse.ens.fr/files/capital21c/en/pdf/F10.9.pdf http://piketty.pse.ens.fr/files/capital21c/en/pdf/F10.10.pdf http://piketty.pse.ens.fr/files/capital21c/en/pdf/F10.10.pdf