香港—托马斯·皮克提（Thomas Piketty）在其畅销书《二十一世纪资本论 》 （ Capital in the Twenty-First Century）中指出，资本主义的种种机制加剧了不平等，而这些机制都基于同一个概念 — — r（资本回报）下降得比g（收入增长）更快。
HONG KONG – In his bestselling book Capital in the Twenty-First Century, Thomas Piketty argues that capitalism aggravates inequality through several mechanisms, all of which are based on the notion that r (the return on capital) falls less quickly than g (growth in income).