• 보건행정학회지
• /
• 제14권4호
• /
• pp.48-74
• /
• 2004

Considering the existence of asymmetric information between doctor and patient, the doctor's reimbursement method has been considered as a desirable policy device of improving efficiency of patient's use of medical care in terms of its affecting doctor's practice pattern by determining doctor's practice revenue. By using the Community Tracking Study (CTS) physician data set, which includes not only various information on doctors practice arrangements and sources of practice revenue, but also vignettes of various clinical presentations, this paper investigates doctor's reaction to the financial incentive under the control of patient's specific medical situation. Under the econometric model for exploring the effect of doctor's reimbursement method on his/her practice patterns; referring patients, recommend doctor-visit or medical tests, the Hausman's specification test was used for checking out the possibility of the doctor's reimbursement method being endogeneized explanatory variable. In the case where the endogeneity problem of doctor's reimbursement method exists, the 2SLS method was used for correcting that problem, and the multiple regression method was used in the case where the problem is found to be nonexistent. Based on the empirical results, this paper finds that doctors do appear to respond to financial incentive. The empirical results show that the doctor's reimbursement method statistically significantly affects doctor's practice pattern and are coincident with the theoretical result proposed by previous researches, This results suggest, as doctor's practice revenues are mainly determined by prospective method, such as capitation, doctors would more refer their patients to specialists, and hesitate in recommending doctor-visit or medical exam.

• 노동경제논집
• /
• 제27권2호
• /
• pp.139-159
• /
• 2004

10년 이상 장기복무한 후 제대한 군인의 사회에서 재취업률은 최근 들어 연평균 30%에도 미치지 못하는 실정으로 향후 군비축소에 따른 국방인력 감축까지 고려한다면 제대군인의 실업문제는 매우 우려할 수준에 와 있다. 본 연구는 장기복무 제대군인들의 전역 후 취업진로 결정에 영향을 미치는 요인을 설문조사를 통해 도출한 후 계량분석하였다. 결과를 요약하면, 봉급생활을 선택한 집단에 비해 자영업을 선택한 집단이 배우자의 소득이 높은 것으로 나타났으며, 경제활동을 포기한 계층은 군복무 기간이 더 길고 계급도 높으며, 질병이나 장애가 있는 경우로 나타났다. 그리고 군복무 기간이 길수록, 직업보도교육에 참여하지 않은 사람일수록 제대 후 첫 직장탐색 기간이 단축되는 반면, 교육수준이 높을수록, 가장 오래 복무한 지역이 서울 지역인 사람이 여타 지역 근무자에 비해 직장탐색 기간이 길어진다는 결과를 얻었다.

• 자원ㆍ환경경제연구
• /
• 제15권3호
• /
• pp.555-574
• /
• 2006

본고는 댐호수가 제공하는 휴양가치가 댐특성의 변화에 의해 어떻게 달라지는지를 추정하고자 하였다. 이 목적을 위해 실제로 댐방문행위를 분석할 수도 있으나 이 경우 주요 특성변수의 추정이 불가능하거나 어렵고 변수들간의 독립성도 약하여 통계적으로 의미있는 추정결과가 나타나기 어려운 경우가 있고, 따라서 본 연구는 대안으로 선택실험을 실시하여 수질과 수량 및 기타 특성변수의 경제적 가치를 도출하고자 하였다. 선택실험자료를 이용한 추정결과를 10개 주요 댐호수의 선택문제에 적용하여 다양한 시나리오별 특성변화의 경제적 가치를 도출하였다. 분석결과 수질이 특히 민감하게 휴양가치에 영향을 미치는 것으로 나타났고, 수질이나 환경에 부의 영향을 주도록 지나치게 큰 댐을 짓거나 유람선 운행 등을 할 경우 오히려 휴양가치가 감소할 수도 있음이 보여졌다. 모든 댐의 수질이 1등급 개선될 경우 휴양객들은 자신이 댐 1회 방문을 위해 평균적으로 지불하는 비용 이상의 편익을 추가로 얻는 것으로 나타났다. 댐과 관련된 교육홍보관 운영, 댐 인근 및 댐호수 지역의 여타 레크리에이션 기회의 증가도 통계적으로 의미있는 정도로 휴양편익증가에 기여하는 것으로 나타났다.

• 보건행정학회지
• /
• 제15권2호
• /
• pp.16-36
• /
• 2005

Due to the existence of asymmetry of information between doctor and patient, it has been believed that doctor might affect patient's decision making process of purchasing medical care. Based on this notion, doctor's reimbursement method has been suggested as an effective policy device of improving efficiency of patient's medical care use by way of its affecting doctor's practice pattern. By using the Community Tracking Study (CTS) household and physician data set, which includes not only various information on patient's medical care use, but doctor's practice arrangements and sources of practice revenue, this paper investigates the effect of community doctor's characteristics of reimbursement method on community patient's medical care use under the control of patient's socio-demographic characteristics and community doctor's practice type. In the process of estimating econometric model, the endogeneity problem of individual health insurance purchase was corrected by using 2818. And due to the existence of sample selection problem, Heckman's two-step estimation method was used for strengthen the robustness of estimation which was adversely affected by sample selection problem The empirical results show that as the average value of community doctor's portion of practice revenue determined by prospective method out of total revenue increases, the community patient's total out-of-pocket medical cost decreases. This results suggest, as doctor's practice revenues are mainly determined by prospective method, such as capitation, doctors would be more conscious about practice cost, which might affect doctor's practice pattern and by which his/her patient's use of medical care would decrease.

• 한국컴퓨터정보학회논문지
• /
• 제26권10호
• /
• pp.179-184
• /
• 2021

본 논문에서는 딥러닝 기반의 순환신경망을 이용하여 선박 연료유 예측을 시도하였다. 해운업에서는 선박 운항비에서 연료유가 차지하는 비중이 가장 크고 가격 변동성도 크기 때문에, 해운 기업은 합리적이고 과학저인 방법으로 연료유를 예측하여 시장경쟁력을 확보할 수 있다. 본 논문에서는 순환신경망 모델 3가지(RNN, LSTM, GRU)를 이용하여 싱가폴의 HSFO 380CST 벙커유 가격을 단기 예측하였다. 예측결과, 첫째, 선박 연료유 단기적 예측을 위해서는 장기 메모리를 사용하는 LSTM, GRU보다는 일반적인 RNN 모델의 성능이 우수한 것으로 분석되어, 장기적 정보의 예측 기여가 낮은 것으로 분석되었다. 둘째, 계량경제학 모델을 사용한 선행연구와 비교하여 순환신경망 모델의 예측성능이 우수한 것으로 분석되어 연료유가의 비선형적 특성을 고려한 순환신경망 모델을 통한 예측 연구의 필요성을 확인하였다. 연구의 결과는 선박 연료유의 단기 예측을 통하여 해운기업의 선박 연료유 수급 결정과 같은 의사결정에 도움이 될 수 있을 것으로 기대된다.

• Journal of Korea Trade
• /
• 제25권5호
• /
• pp.93-109
• /
• 2021

Purpose - The logistics industry is often featured by its location relevance and industrial concentration. Industrial concentration is conducive to the effective transmission of information by reducing transaction costs and improving transaction efficiency, thus promoting the development of trade. The main purpose of this paper is to measure the spatial total factor productivity and location quotient of the logistics industry in Korea, and to study the impact of the logistics industry efficiency and agglomeration effect on import and export trade in Korea. Design/methodology - First, used the spatial stochastic frontier method to measure the spatial total factor productivity of the logistics industry in Korea, this serves as the efficiency index of the logistics industry in various regions of Korea. Second, calculated the location quotient (LQ) of the logistics industry to measure the industry's concentration degree. Third, employed a spatial econometric model to analyze the impacts of factors such as the efficiency and concentration levels of the logistics industry on import and export trade in Korea. Findings - This study's main findings can be summarized as follows: this study found that the overall efficiency of the logistics industry in Korea needs to be improved, even though it showed an upward trend in all regions of the country; Moreover, the agglomeration level of Korea's logistics industry needs to be improved; Finally, the positive spatial correlation and industrial agglomeration effect of Korea's logistics industry had a positive impact on the country's import and export trade. Originality/value - This study is innovative in terms of research perspective and methods. Most of the previous studies have measured the development level of the logistics industry using the logistics performance index (LPI), Fewer studies have assessed through the spatial total factor productivity and location quotient of the logistics industry in Korea to measure the efficiency index of the logistics industry in various regions of Korea and concentration degree, as well as there was almost no study on the impact of logistics industry efficiency and agglomeration effect on import and export trade in Korea. This study addresses this limitation by analyzing the impacts of the efficiency and agglomeration effect of the logistics industry on import and export trade in Korea.

• 아태비즈니스연구
• /
• 제12권1호
• /
• pp.209-223
• /
• 2021

Purpose - The purpose of this study was to investigate the relationship between Korea agricultural productions and Greenhouse Gas (GHG) emissions based on Environmental Kuznets Curve (EKC) hypothesis. Design/methodology/approach - This study utilized time series data of economic growth, greenhouse gas, agricultural productions, trade dependency, and energy usages. In order to econometric procedure of EKC hypothesis, this study utilized unit root test and cointegration test to check staionarity of each variable and also adopted Vector Error Correction Model (VECM) and Ordinary Least Square (OLS) to analyze the short and long run relationships. Findings - In the short run, greenhouse gas emissions resulting from economic growth show an inverse U-shape relationship, and an increase in agricultural production and energy consumption led to increase in greenhouse gas emission. In the long run, total GHG emissions and CO2 emissions show an N-shaped relationship with economic growth, and an increase in agricultural production has resulted in a decrease in total GHG and CO2 emissions. However, methane (CH4) and nitrous oxide (N2O) emissions showed an inverse U-shape relationship with economic growth, which indicated the environment and production process of agricultural production. Research implications or Originality - Korea agricultural production has different effects on the GHG emission sources, and in particular, methane (CH4) and nitrous oxide (N2O) emissions show to increase as the agricultural production expansions, so policy or technological development in related sector is required. Especially, in the context of the 2030 GHG reduction road-map, if GHG-related reduction technologies or policies are spread, national GHG emission reduction targets can be achieved and this is possible to predict the decline in production in the sector and damage to the related industries.

• 국제지역연구
• /
• 제14권3호
• /
• pp.221-246
• /
• 2010

본 연구는 최근 글로벌 외환시장에서 첨예하게 대립하고 있는 환율갈등의 요인을 분석하기 위해 국가간 실질 및 명목이자율 차이가 환율결정에 미치는 영향을 분석하였다. 유위험, 무위험, 및 실질이자율평가의 실증분석 결과를 종합해 보면 유위험이자율평가가 다른 두 경우보다, 실질이자율평가가 무위험이자율평가 보다 환율결정에 더욱 영향을 미치기는 하지만 그 정도는 충분히 크지 않은 것으로 분석되었다. 또한, 국가간 환율결정에 실질이자율평가가 성립되지 못하는 원인을 규명하기 위해 국가할증, 환율변동위험 할증, 및 통화할증을 분석하였는데, 그 결과에 의하면 국가할증과 환율변동위험 할증이 실질이자율평가의 성립을 어렵게 하는 요인으로 분석되었다. 실증분석 결과를 종합해 볼 때 최근의 국가간 환율갈등의 원인은 외환위기 이후 글로벌 외환시장에서 환율이 각국의 경제력을 바탕으로 결정되기 보다는 시장의 외부요인인 전략에 의해 영향을 받았기 때문인 것으로 보인다. 따라서 환율갈등을 완화 또는 근본적으로 해결하기 위해서는 각국의 외환정책 당국은 시장지향적이고 시장결정적인 환율제도를 구축하여야 할 것이다.

• Journal of Korea Trade
• /
• 제24권3호
• /
• pp.1-19
• /
• 2020

Purpose - This study empirically analyzes the effects of provisional anti-dumping duties levied on imports by Korea following anti-dumping investigations. An anti-dumping duty is a legal tool that countries use to impose duties on imports to offset injurious dumping. This study verifies how effective the imposition of a provisional anti-dumping duty is and whether such duties have trade chilling effects on aggregate imports. Specifically, this study examines import trade diversion from named to unnamed countries caused by the imposition of provisional anti-dumping duties. Design/methodology - This empirical analysis employs an econometric model of provisional anti-dumping measures for cases in which Korea imposed final affirmative anti-dumping measures. We construct a monthly panel dataset for each stage of anti-dumping investigation undertaken by Korea for all manufacturing industries during 1995-2013. We illustrate a stage-by-stage analysis of anti-dumping investigations from initiation, preliminary decision, imposition of provisional duty, final affirmative decision, and imposition of final affirmative duty on a monthly basis at the six-digit harmonized system code-level. Findings - For cases in which provisional duties are imposed, the reduction in imports from named countries outweighs the increase in imports from unnamed countries. The substantial reduction in imports from named countries is large enough to offset the import diversion to unnamed countries, suggesting that import diversion in investigations is limited during the investigation period. Therefore, the use of provisional anti-dumping duties in Korea is effective, providing evidence of a chilling effect on aggregate imports. Originality/value - Few studies examine the size of the effects on import trade diversion of the imposition of provisional anti-dumping duties. We contribute to the literature by disentangling separate trade effects for each phase of the anti-dumping investigation process and imposition of provisional duty.

• 경제분석
• /
• 제25권3호
• /
• pp.1-29
• /
• 2019

본고에서는 OECD 회원국(2018년 현재 총 36개국) 중 29개국을 대상으로 상용직·임시직 고용비중 변화가 노동생산성에 미치는 영향을 실증 분석하였다. 이 때 자영업자도 함께 고려함으로써 상용직 및 임시직 대비 노동생산성을 비교하였다. 구체적으로는 1990-2015년 동안 OECD 29개국의 국가별 불균형(unbalanced) 패널자료를 이용하여 통상최소자승법(OLS), 고정효과(fixed effect) 분석, 일반화된 적률법(이하 GMM), 동태적 패널 GMM 등 다양한 방법으로 고용형태 변화가 노동생산성에 미치는 영향을 추정하였다. 분석 결과를 보면, 각 추정 방법에 따라 약간 차이는 있으나 상용직 비중 증가가 노동생산성 증대에 미치는 영향이 가장 높았으며 그 다음이 자영업, 임시직 순으로 나타났다. 특히 임시직 근로자 비중이 노동생산성에 미치는 영향은 상용직에 비해 상당 폭 낮은 것으로 추정되었다. 이러한 결과는 노동시장 이중구조가 심화되면 노동생산성에 부정적 영향을 미칠 가능성이 있음을 시사한다.