MORE, Dr PIKETTY …. 29 January 2019 Bryan Kavanagh Leave a comment http://mattrognlie.com/piketty_diminishing_returns.pdf For “interest” read “return on produced capital”.https://www.washingtonpost.com/news/wonk/wp/2015/03/19/meet-the-26-year-old-whos-taking-on-thomas-pikettys-ominous-warnings-about-inequality/?noredirect=on&utm_term=.ad8574d58a95