We extend a theory of fidelity in a two-sided economy, and empirically discriminate between different rationales of sexual network formation by testing their implications for how sex ratios affect sexual activity, relationship stability, and the spread of sexually transmitted diseases in men...

In societies organized around distinct racial and ethnic groups, limited communication between these groups might increase the search cost of sexual partners outside of own group, leading to racially segregated sexual networks and low risks of sexually transmitted infections (STIs). At the same...

How does the sex ratio affect sexual network formation, relationship stability, and the spread of sexually transmitted diseases, and how do these effects differ by gender? We address these questions by developing a dynamic theory of sexual network formation in a two-sided economy, where agents...