The XX Factor, Slate’s women-written blog, welcomes a new voice today: EJ Graff. Graff, the author of Getting Even and What Is Marriage For?, is an expert on social policy, with a particular focus on women’s issues. She’s a senior correspondent for The American Prospect and a regular contributor to TPMCafe. (She has also written for Columbia Journalism Review, the magazine, on several occasions.)

Graff should make a great addition to the XX Factor; we look forward to reading her contributions.