Dranove David, Lindrooth Richard, White William D, Zwanziger Jack
Northwestern University, Kellogg School of Management, 2001 Sheridan Road, Evanston, IL 60208-2013, USA.
J Health Econ. 2008 Mar;27(2):362-76. doi: 10.1016/j.jhealeco.2007.05.004. Epub 2007 Nov 29.
Prior studies find that the growth of managed care through the early 1990s introduced a strong positive relationship between price and concentration in hospital markets. We hypothesize that the relaxation of constraints on consumer choice in response to a "managed care backlash" has diminished the price sensitivity of demand facing hospitals, reducing or possibly reversing the price-concentration relationship. We test this hypothesis by studying the price/concentration relationship for hospitals in California and Florida for selected years between 1990 and 2003, while addressing the potential endogeneity of concentration. We find an increasingly positive price/concentration in the 1990s with a peak occurring by 2001. Between 2001 and 2003, the growth in this relationship halts and possibly reverses.
先前的研究发现，到20世纪90年代初，管理式医疗的发展在医院市场中引入了价格与集中度之间的强正相关关系。我们假设，作为对“管理式医疗反弹”的回应，消费者选择限制的放松降低了医院面临的需求的价格敏感性，从而减弱或可能扭转了价格与集中度的关系。我们通过研究1990年至2003年期间选定年份加利福尼亚州和佛罗里达州医院的价格/集中度关系来检验这一假设，同时处理集中度的潜在内生性问题。我们发现，20世纪90年代价格/集中度关系日益正向，到2001年达到峰值。在2001年至2003年期间，这种关系的增长停止，甚至可能发生逆转。
