Nate Silver: Be Skeptical of Both Piketty And His Skeptics

Science is messy, and the social sciences are messier than the hard sciences. Research findings based on relatively new and novel data sets (like Piketty’s) are subject to one set of problems — the data itself will have been less well scrutinized and is more likely to contain errors, small and large. Research on well-worn datasets are subject to another. Such data is probably in better shape, but if researchers are coming to some new and novel conclusions from it, that may reflect some flaw in their interpretation or analysis.

The closest thing to a solution is to remain appropriately skeptical, perhaps especially when the research finding is agreeable to you. A lot of apparently damning critiques prove to be less so when you assume from the start that data analysis and empirical research, like other forms of intellectual endeavor, are not free from human error. Nonetheless, once the dust settles, it seems likely that both Piketty and Giles will have moved us toward an improved understanding of wealth inequality and its implications.