Examining race when it comes to online dating

I’ve been looking at studies examining race when it comes to online dating. One states:

The users of the dating service typically have strong preferences for a partner of their own ethnicity, and this effect is more pronounced for women than for men.

Another (diagram shown here) shows a more complex system of preferences likely dictated by societal norms.

(via Online dating app reveals how race matters in romance)

[NPR]