The share of computer science and engineering degrees going to women has increased at the most selective American universities over the past 20 years and is approaching gender parity, while the proportion has declined at less selective schools. Those are the main findings of a study my colleague and I recently published in the journal Science. Jo R. King and I analyzed over 34 million bachelor’s degrees awarded by nearly 1,600 American universities from 2002 to 2022 – data covering almost all bachelors-degree-granting institutions in the U.S. We wanted to identify which factors best predict parity among men and women in physics, engineering and computer science majors.