"I had noticed it before, but it was not until working on the 100 Notes, 100 Thoughts notebook project for Documenta 13, at the point that we were fully engaged in sending out invitations to potential authors, that I had absolute proof. Every time we invited a male author, with very few exceptions, a positive response came the same day or the day after. When the same letter was sent to a female author, the response took much longer, and very often took the form of a carefully written text that showed that the person had given thought to the matter but had decided in the negative."