What is the link between innovation and social mobility? Philippe Aghion, July 30, 2015, Opinion. "Over the past decades, we have seen an accelerated increase in top income inequality worldwide, particularly in developed countries (Goldin and Katz 2008, Deaton 2013, Piketty 2013). In recent research (Aghion et al. 2015), we argue that in developed countries, starting with the US, innovation is an unavoidable part of the story. Thus, if we look at innovation (measured by the annual flow of patents) and top income inequality (measured by the top 1% income share) in the US since the 1960s, we see that these two follow parallel evolutions..." Link