Below is direct quote from Deborah Frisch in her email to a public email list:
An interesting question raised by Summers' comments is "Why are there are so
few women in economics?" One hypothesis is that the main barrier to entry is
the magnitude of the mathematical ability required to be an economist. An
alternative hypothesis is that the low prevalence of women in economics is
mainly due to other barriers to entry such as sexual discrimination in hiring
and promotion, the necessity of pretend