An experiment shows shoppers on Ebay act in a sexist way. For most products, they offer a higher bid if the seller is male.

For a few products, the effect goes the other way.

Sexism has been demonstrated in other areas; for instance, evaluation of the merit of scientific work is affected by sexism.

My father's second wife was a painter. When she was young, she signed her paintings with a name that could be take for masculine, to avert sexism. Her paintings sold better that way.