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DEA-AR/AHP 결합모형을 이용한 지방의료원의 효율성 분석
양동현,Yang, Dong-Hyun 한국보건행정학회 2010 보건행정학회지 Vol.20 No.4
The purpose of this empirical study is to evaluate efficiency of the regional public hospitals, using DEA(Data Envelopment Analysis). to do this, we design a DEA-AR/AHP Hybrid model to evaluate efficiency of 34 Regional Public Hospitals. the proposed model is developed by adding Acceptance Region(AR). using analytical hierarchy process(AHP). this model is compared with those of typical DEA models. Financial data used in this study were obtained from Database of the Korea Association Regional Public Hospital and analyzed using DEA model. As a result of analysis, This study found that the DEA-AR/AHP Hybrid model was superior to those typical DEA models in determining the priority among efficient hospitals. the result of this study can provide helpful information to evaluate the efficiency of public hospitals for efficient operational management, to develop more precise measurement for the priority of the efficient hospitals.
확률변경모형(Stochastic Frontier Model)을 이용한 공공병원의 기술적 비효율성(Technical Inefficiency) 분석
양동현 ( Dong Hyun Yang ),장영재 ( Young Jae Jang ),노재확 ( Jae Whak Rho ) 한국보건경제정책학회 2012 보건경제와 정책연구 Vol.18 No.4
This analysis studied on the technical inefficiencies of regional public hospitals using a stochastic production frontier model. For the empirical analysis the five year data from 2005 to 2009 of 32 regional public hospital data are used. The main focuses are given to reveal whether the technical inefficiency are improved as time goes by, and what is the prior causes of inefficiencies, if there exists. The results can be summarized as follows; First, the proper production model is the 5 elements translog production function rather than the simple labor and capital Cobb-Douglass production model. Second, the technical efficiency of in-patients has not being improved for the considered time of periods. Our findings have some policy implications. In case of in-patients, it is confirmed that there exists some inefficiencies, and those inefficiencies can not be overcome through just improving the inner management system. Rather than, the fact that the business environments which can be upgraded by the policy are needs to be improved is revealed.
영동지방 강설량의 경년변화 특성 및 북태평양 SST와의 관계
양동현(Dong Hyun Yang),류찬수(Chan Su Ryu) 조선대학교 교과교육연구소 2001 교과교육연구 Vol.22 No.1
The characteristic of snowfall at Youngdong area is a key factor which determine the climatology of Korean peninsula. Although the location and characteristic of both cP and mT air-mass are an important factor which determine the snoefall, the Sea Surface Temperature(SST) of the North Pacific as a source of moisture can be a key factor too. To investigate the variation of snowfall at Youngdong area, therefore, we studied the intercorelation of variation between snowfall at Youngdong and SST at North Pacific. The period of dataset used in this study is for 18 years: from 1981 to 1998. The spatial distribution of SST at East-Sea depends on the movement of warm sea current caused by both Dongahn current and coastal current near Japan. According to this study, there were expanding of Siberia high pressure system toward both Younhaejoo and China, generation of mesoscale cyclone at Korean peninsula, and northerly wind which flow along coast line with partially north-easterly wind when there was a heavy snowfall at Youngdong area. This means that the high value of SST at Youngdong area during heavy snowfall dervie increasing of sensible heat flux over sea surface, increasing of easterly wind, and decreasing of air pressure. These processes were the main factors which played an important role for the increasing of moisture convergence and snowfall at Youngdong area. For the occurrence of heavy snowfall at Youngdong area, the following synoptic conditions are required: 1) The high pressure system of Siberia should be expanded toward Yonhaejoo, 2) development of cyclone over northern part of Korea, 3) there is a cyclone at East-Sea. In thoses synoptic condition, there are north-easterly wind influenced by strong sensible and latent heat fluxes from warm sea surface to the lower atmosphere. There heavy snowfall at Youngdong area can be expected in those situation.
메타프론티어 맘퀴스트 생산성 지수를 이용한 상급종합병원과 대형종합병원의 생산성 변화 비교
양동현(Dong-Hyun Yang),장영재(Young-Jae Chang) 한국산업경제학회 2013 산업경제연구 Vol.26 No.6
본 연구는 2007년부터 2011년까지 5년 간 대한병원협회의 수련병원 경영실적자료를 이용하여 상급종합병원그룹과 대형종합병원그룹의 확률변경생산함수와 메타확률변경함수를 추정하여 그룹기술효율성과 메타효율성, 메타프론티어 맘퀴스트 생산성 지수를 측정하였으며 상급종합병원과 종합병원 간 기술격차, 규모수익, 그리고 생산성 변화를 비교분석하였다. 본 연구의 분석결과와 시사점을 정리하면 다음과 같다. 본 연구의 결과에서 상급종합병원은 대형종합병원에 비해 기술효율성과 기술격차는 선도적인 입장에 있으나 규모의 비효율성이 대형종합병원에 상대적으로 높으며 규모의 비효율성이 증가하고 있다. 상급종합병원은 규모의 비효율성이 증가함에도 불구하고 상급종합병원들은 지속적인 분원신축과 병상증설이 이루어지고 있다. 이로 인해 종합병원 간 과당 경쟁으로 의료시장의 왜곡이 더욱 심화되고 있다. 따라서 의료기관의 종별 기능을 제도화하고 상급종합병원의 병상증설과 병원신축을 억제함으로써 의료기관 종별로 환자분산을 통하여 균형 있는 병원산업으로 발전하여야 할 것이다 This study measured group technical efficiencies, meta technical efficiencies, and meta productivity indices with stochastic frontier production function and meta stochastic frontier functions for advanced general hospitals and large general hospitals of Korea using annual data from 2007 to 2011 of management performance collected by Korean Hospital Association and then analyzed technology gap ratio, returns to scale, and productivity changes. We found that advanced general hospitals were superior to large general hospitals in terms of technical efficiencies and technology gap ratios but their scale inefficiencies were increasing sharply. In the spite of the rising scale inefficiencies, advanced general hospitals built branches and increased hospital beds. The resulting overcompetition among advanced general and general hospitals distorted domestic medical service market further. For a balanced growth of Korean hospital industry with inducing patients to diversely consume general hospitals in terms of function and region, a policy of reorganization of general hospitals and constrain of both the construction of new general hospitals and the expansion of existing ones was necessary.
종합병원의 생산성 및 기술격차 변화 분석 -부트스트랩 메타 맘퀴스트 생산성 지수를 이용하여
양동현 ( Dong Hyun Yang ),장영재 ( Young Jae Chang ) 한국보건경제정책학회 2013 보건경제와 정책연구 Vol.19 No.4
This study calculated meta Malmquist indices and their bootstrapped estimates and then decomposed them into technical efficiency change (TEC), technology change (TC), pure technology catch up (PTCU), frontier catch up (FCU), using annual data set of general hospitals from year 2007 to 2011 collected by Korean Hospita Association and then analyzed productivity change and technology gap of Korean general hospitals. The results and implications were as follows below. First, Senior general hospitals led other general hospitals since their meta technical efficiencies were higher than those of the others and technology gap ratio to the meta frontier was smaller than those of the others. Second, group productivity of small and medium general hospitals increased larger than Senior and large general hospitals due to the differences of PTCU and FCU. Finally, small and medium general hospitals had high potential to improve their efficiencies by sharing medical and managerial skills. This result implied Korean hospital industry could grow and develop in a balanced way by sharing and learning medical and managerial skills of Senior and large general hospitals.