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        허핀달-허쉬만지수를 이용한 병원시장의 경쟁 수준 측정

        노진원 ( Jin Won Noh ),권영대 ( Young Dae Kwon ),강성욱 ( Soung Wook Kang ),주지수 ( Ji Soo Joo ) 경희대학교 경영연구원 2007 의료경영학연구 Vol.1 No.1

        Objective: A new index, the Herfindahl Hirschman Index (HHI), is developed to measure competition between hospitals within a district. This study investigated the differences in competition between hospitals using the HHI and compared the index with the indirect indices measuring the degree of competition. Method: Hospital markets were divided into small regions using the healthcare catchment area and geographical/administrative boundaries. Annual medical revenue from the income statement is used to analyze the market share of each hospital in its respective market area. Market share was estimated by the ratio of each hospital`s revenue to the total medical revenue of the selected hospitals in the areas investigated. Correlation analysis was performed to compare the HHI with the indirect measurements of the level of competition presently used. Results: The HHI revealed different competitive levels (high, medium, low) over the regions. The result of the analysis for the local government areas was similar. A few small areas within the same healthcare catchment area had disparately larger differences in market share. There was a high correlation between the existing indices that indicate the medical resource allocation in the medical market and the HHI that measures the competition levels. Conclusion: This study could measure the competition levels more macroscopically using an area-based method rather than a hospital-based method. The results justify the use of HHI as an evaluation standard index to represent the level of competition. This index could be used as basic data to verify the effect of the competition between hospitals.

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