The boards of public companies are watched carefully to see how they’re doing on gender parity and other measures of diversity. Joint venture boards get far less scrutiny — and it shows. According to our latest research, which covered more than 200 joint ventures across industries and geographies, only about 10 percent of JV directors are women. Compare that with the S&P 500 corporate boards, where 26 percent of directors are women. (That’s still a small number, but it’s been moving up.)