Understanding the effects of competition among Internet service providers on the availability and quality of broadband is important for policies aimed at decreasing the digital divide. To improve this understanding, I develop and estimate a structural model of vertical differentiation using...

New empirical evidence shows substantial heterogeneity in the altruism of healthcare providers. Spurred by this evidence, we build a spatial quality competition model with altruism heterogeneity. We find that more altruistic healthcare providers supply relatively higher quality levels and...