 The common explanation for the Berkeley data, on which the paradox results from women applying to more selective department, points to a larger class of cases in which it is important to account for differences in the difficulty-level across tasks. In baseball, for instance, it appears that over time batters have been striking out more frequently, despite their improving in their ability to hit more difficult pitches while remaining as good at hitting less difficult ones (Watt 2016 [see Other Internet Resources]).  This could be accounted for by the fact that pitchers have been throwing a higher proportion of difficult-to-hit pitches. This highlights the way that statistics about success rates in performing a task can be misleading in cases where the task-difficulty changes over time.