"There are 39 women who rank in the top 1000 economists and 0 of them blog. Contrast that with the men. Consider the top 100 men. In this elite subset; at least 8 of them blog. Consider the men ranked between 101 and 200. At least, six of them blog. So, this isn't very scientific but we see a 7% participation rate for excellent male economists and a 0% participation rate for excellent women. This differential looks statistically significant to me."