For a short introduction, see chapter 6 on hospitals in the following textbook,
Sloan, Frank A., and Chee-Ruey Hsieh (2016), Health Economics, second edition, MIT Press, Cambridge Massachusetts.
The following list of references (not a reading list) is just an indication and proposes some points of entry in the relevant literature.
Antel, J. J., R. L. Ohsfeldt and E. R. Becker (1995), “State Regulation and Hospital Costs”, Review of Economics and Statistics, 77(3), 416-422.
Bloom, N., C. Propper, S. Seiler, et al. (2015), “The Impact of Competition on Management Quality: Evidence from Public Hospitals “, Review of Economic Studies, 82(2), 457-489.
Cuellar, A. E. and P. J. Gertler (2006), “Strategic Integration of Hospitals and Physicians”, Journal of Health Economics, 25(1), 1-28.
David, G., R. C. Lindrooth, L. A. Helmchen et al. (2014), “Do Hospitals Cross-Subsidize?”, Journal of Health Economics, 37, 198-218.
Devereaux, P. J., P. T. L. Choi, C. Lachetti et al. (2002), « A Systematic Review and Meta-Analysis of Studies Comparing Mortality Rates of Private For-Profit and Private Not-For-Profit Hospitals”, Canadian Medical Association Journal, 166 (11), 1399-1406.
Dranove, D., M. Shanley and C. Simon (1992), “Is Hospital Competition Wasteful?”, Rand Journal of Economics, 23(2), 247-262.
Duggan, M. (2002), “Hospital Market Structure and the Behavior of Not-For-Profit Hospitals”, Rand Journal of Economics, 33(3), 433-446.
Eggleston, K., Y. C. Shen, J. Lau et al. (2008), “Hospital Ownership and Quality of Care: What Explains the Different Results in the Literature?”, Health Economics, 17(12), 1345-1362.
Gaynor, M, K. Ho and R. J. Town (2015), “The Industrial Organization of Health-Care Markets”, Journal of Economic Literature, 53(2), 235-284.
Ho, K. and A. Pakes (2014), “Hospital Choices, Hospital Prices and Financial Incentives to Physicians”, American Economic Review, 104 (2), 3841-3884.
Kessler, D. P. and M. B. McClellan (2000), “Is Hospital Competition Socially Wasteful?”, Quarterly Journal of Economics, 115(2, 577-615.
Salkever, D.S. (2000), “Regulation of Prices and Investment in Hospitals in the United States”, in Newhouse, J. P. and A.J. Culyer, Handbook of Health Economics, vol 1B, 1490-1535, Elsevier North Holland, Amsterdam.
Sloan, F. A., G. A., Piccone, D. H. Taylor et al. (2001), “Hospital Ownership and Cost and Quality of Care: Is there a Dime’s Worth of Difference?”, Journal of Health Economics, 20(1), 1-21.