I've commented on studies like that on HN before, but you have to read them very carefully. They are invariably written by people who wanted to reach a particul

I've commented on studies like that on HN before, but you have to read them very carefully. They are invariably written by people who wanted to reach a particular conclusion before they started. In this case there are two problems. 1) They ignored unprofitable companies in their analysis. If more women in leadership roles were to increase the variability of profitability/loss making, their analysis would show only that it increased profitability. 2) Like all such studies they don't restrict to countries that don't have gender quotas. Some rich countries have imposed artificial quotas to get women into leadership roles, e.g. Norway is named in the article. Well, if you take rich successful countries and then force women into leadership roles by legal decree, it will appear that there is a correlation between more women and more success. But it's a correlation/causation problem. I've never seen a study of this issue that didn't strike me as being artificially set up to reach the authors preferred conclusions.