Have no idea. But also have an inkling that distributions would differ (and not necessarily the way you&#x27;d expect) in projects that require a specialized skill set, such as e.g. top notch design skills or knowledge of DB internals and such.<p>The point being, as stated the whole thing very much resembles the Berkeley gender discrimination study, so proposed improvements are quite obvious: break things down further by project, see if you can glean something from per-project (or at least per-domain) distribution. There might be nothing there, mind you, and the stated conclusions might still hold, but without controlling for the confounding factor there&#x27;s no way to tell, and the conclusion of this study is therefore not above suspicion.