To disentangle correlation from causation, Paul Gompers and Sophie Wang conducted another fascinating study. They reviewed alumni data from universities that accounted for most of the venture capital partners in their sample. They discovered that partners with daughters tended to hire more women as partners in their firms. Then they examined venture capital fund performance, and they found a substantial advantage for funds with at least one woman serving as a partner. According to HBS Working Knowledge, "While the median venture capital fund return is around 14 to 15 percent, funds with a female partner returned 16 to 17 percent. Moreover, having women as partners increased the percentage of successful startups supported by those firms—that either went public or sold for more than their total capital investment—from about 28 percent to about 31 percent."