The recent IFS report on the gender pay gap attracted huge coverage - top of the news, and all over the front pages.  It's the first of a series the Institute is doing on this issue, which is excellent news;  I look forward to seeing what comes out. The report does an excellent job in distinguishing between the various types of wage gap, in two major respects.  First, it shows the need to distinguish different groups according to the hours they work.  Obviously, the hourly difference is far smaller than the weekly difference, since women work fewer hours: it shrinks from 36% to 19%.  It shrinks further, to 16%, for…