1. Entry and competition in local hospital markets;Abraham,1999
2. Competition between non-profit and for-profit health insurers;Adamache;Journal of Health Economics,1983
3. Contracts as a barrier to entry;Aghion;American Economic Review,1987
4. The short-term effects of merger on hospital operations;Alexander;Health Services Research,1996
5. Discrete Choice Theory of Product Differentiation;Anderson,1992