Don't have time right now for the full book, which is huge and probably more data than I need. I felt the summary was usefull. Seems to agree with what other things I've read about his analysis. I'll let others sort out any questions regarding the data. I suspect in the end Nate Silver's perspective (my interpretation of what he said) that yeah complex non uniform data across various time periods and sources will not be totally clean, but the conclusion will most likely stand. Piketty's work is already important and hopefully will not be forgotten or swept away by those it does not, in the short run anyway, serve.