• 상하수도학회지
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• 제23권5호
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• pp.637-645
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• 2009

To understand the financial situation of waterworks, the revenue and operation cost from 1996 have been analyzed. The budget of waterworks was 3,775 billion won in 1996 and grew up to 5,774 billion won in 2007. The budget has grown about 1.53 times during 11 years. Based on 2007, total cost for supplying water, rehabilitating old facilities and returning debt and its interest was 4146 billion won. The cost was recovered by 2,825 billion won of water revenue, 827 billion won of various fees revenue, 571 billion won of financial grant and 89 billion won of loan. Until 2007, the 15.3% of operation cost for waterworks was covered by government grant and loan. The renovation cost for old non-efficient facilities was 1,356 billion won in 1996 and was 1,486 billion won in 2007. The renovation cost was not increased remarkably during 10 years. Since the total operation cost was increased about 1.5 times, the percentage for renovating old facilities was decreased from 36% to 25.7%. This trend need to be alerted because the renovation has been slow down when the facilities for water supply need more rehabilitation.

• ETRI Journal
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• 제36권4호
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• pp.581-590
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• 2014

This study investigates the impact of tweets on box office revenue. Specifically, the study focuses on the times when tweets were written by examining the impact of pre- and post-consumption tweets on box office revenue; an examination that is based on Expectation Confirmation Theory. The study also investigates the impact of intention tweets versus subjective tweets and the impact of negative tweets on box office revenue. Targeting 120 movies released in the US between February and August 2012, this study collected tweet information on a daily basis from two weeks before the opening until the closing and box office revenue information. The results indicate that the disconfirmation that occurs in relation to the total number of pre-consumption tweets for a movie has a negative impact on box office revenue. This premise suggests that the formation of higher expectations of a movie does not always result in positive results in situations where tweets on perceived movie quality after watching spread rapidly. This study also reveals that intention tweets have stronger effects on box office revenue than subjective tweets.

• 한국산학기술학회논문지
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• 제15권11호
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• pp.6646-6651
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• 2014

이 논문은 정부가 1999년부터 시행하고 있는 농업관측사업에 초점을 두고 특히, 관측사업으로 인한 과일류 부문의 최대 사회후생효과를 파악하는데 목적을 두고 있다. 농업관측이란 농산물 시장의 공급 및 수요 관련 정보를 수집 분석하여 미래를 예측하고 그 결과를 공개하는 과정을 의미한다. 즉, 생산자, 유통 가공업자, 소비자, 수출입업자 등 관련기관의 모든 시장 참여자들을 대상으로 정보를 수집하여, 시장에 제공함으로써 정보의 부족과 왜곡을 줄이고, 가격메커니즘이 원활하게 작동되도록 하여 사회 전체적으로 자원 배분의 효율성을 높이는데 관측의 역할이 있다. 이 연구는 선행연구의 추정결과와 비교를 위해 Lee et al.[6]와 Kim et al.[5]의 방법을 이용하여 과일류 사회후생효과를 계측하였다. 농업관측사업으로 인한 과일류 부문 최대 사회후생효과(2012년 기준)는 사과 152억 2,800만원, 배 31억 5,400만원, 복숭아 19억 3,600만원, 포도 52억 1,100만원, 감귤 449억 7,600만원, 단감 25억 9,000만원으로 계측되었다. 이와 같은 과일류 사회후생효과가 각 과일품목의 생산액에서 차지하는 비중은 사과 1.5%, 배 1.8%, 복숭아 0.9%, 포도 1.0%, 감귤 5.4%, 단감 0.8% 등으로 추정된다.

• Journal of Ginseng Research
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• 제33권3호
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• pp.240-243
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• 2009

원료삼 생산에 있어 총수익(R)을 결정하는 4요인 승법 모형을 설정하고 (R=AYQP) 세 농가의 수납실적 수치를 사용하여 총수익 결정식임을 확인하였다. 4요소는 자본요소인 재배면적(A), 기술요소인 단위수량(Y)과 가중평균 품질등급(Q) 그리고 시장요소인 평균등급 가격(P)의 3요소로 해석하였다. 기술요소인 YQ는 자본(A)과 수익(R)의 직선모형에서 기울기가 되어 단위자본의 수익창출계수임을 밝혔다. 수익결정식은 인삼산업의 발전이 재배수량과 품질 향상기술 YQ를 증대시켜 면적(A)을 감소시킴으로서 수익(R)을 높여 시장가격(P)을 낮추는데 있음을 보여주었다.

• 경영과학
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• 제29권2호
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• pp.91-103
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• 2012

Revenue management problems originated in the 1970's in the context of the airline industry have been successfully introduced in airline industries. It has started on the capacity control by booking classes for available seats, and has been recognized as a powerful tool to maximize the total revenue. Changing customer behavior and airline market environments, however, has required a new mechanism for improving the revenue. Dynamic pricing is one of innovative tools which is to adjust prices according to the market status. In this paper, we consider a dynamic pricing and seat control problem for discrete time horizon. The problem can be modeled as a stochastic programming problem. Applying the linear approximation technique and given the price set for each time, we suggest a mixed Integer Programming model to solve our problem efficiently. From the simulation results, we can find our model makes good performance and can be expanded to other comprehensive problems.

• 지능정보연구
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• 제20권1호
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• pp.49-65
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• 2014

구전(WOM: Word of Mouth)는 주변 사람들에게 상품에 대한 경험을 입에서 입으로 전달하는 현상을 말하며 소셜 미디어의 발전으로 온라인 구전(eWOM: Electronic Word of Mouth) 형태로 발전하였다. 구전 효과의 중요성으로 인해서 대부분의 기업들의 자사의 상품이나 서비스에 대한 온라인 구전에 촉각을 세우고 있으며, 특히 영화와 같은 경험재의 경우에는 그 영향력이 더욱 크다. 본 연구에서는 영화 커뮤니티에 대한 사회 네트워크 분석을 통해서 영화 흥행성과 지표인 매출에 미치는 영향요인을 규명하고자 한다. 영화 흥행성과 연구들에서 주요하게 다루어진 영화에 대한 구전의 크기(volume)와 방향성(valence)과 같은 구전 요인들을 추가하여, 구전 네트워크의 중심성 척도를 영향 요인에 고려하였다. 구전의 크기, 방향성, 그리고 3가지 중심성 척도(연결 중심성, 매개 중심성, 근접 중심성)의 최종 영화 매출에 영향 관계를 가설로 설정하였다. 제시한 연구 모형을 검증하기 위하여 대표적인 온라인 영화 커뮤니티 사이트인 IMDb(Internet Movie Database)에서 영화 구전 데이터를 수집하였고, Box-Office-Mojo사이트에서 영화 매출 데이터를 수집하였다. 2012년 9월부터 1년 동안, 주간 Top-10에 포함된 적이 있는 영화들을 대상으로 하였으며, 총 103개의 영화가 선정되어 이 영화들에 대한 메타 데이터와 커뮤니티 데이터가 수집되었다. 영화 커뮤니티 네트워크는 평가자들간의 댓글 관계를 기초로 구축하였다. 본 연구에서 사용한 3가지 중심성 척도는 사회 네트워크 분석 도구인 NodeXL을 사용하여 계산되었으며, 각 영화별 커뮤니티 참여자들의 중심성 척도의 평균값을 활용하였다. 가설 검증의 사전 분석을 위한 상관관계 분석에서는 3가지 중심성 척도간에 상관 관계가 높은 것으로 파악되어서, 각각에 대하여 별도로 회귀분석을 수행하였다. 분석 결과, 기존 연구와 일관성 있게 구전의 크기와 방향성은 영화 성과지표인 최종 매출에 긍정적인 영향을 미치는 것으로 파악되었다. 또한 구전 네트워크 내의 참여자 매개중심성 평균은 영화의 최종 매출에 영향을 미치는 것으로 파악되었다. 하지만 연결중심성과 근접중심성은 최종 매출에 영향을 주지 못하는 것으로 나타났다.

• 보건행정학회지
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• 제27권3호
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• pp.199-210
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• 2017

Background: This paper aims to demonstrate current health expenditure (CHE) and National Health Accounts of the years 2015 constructed according to the SHA2011, which is a new manual of System of Health Accounts (SHA) that was published jointly by the Organization for Economic Cooperation and Development (OECD), Eurostat, and World Health Organization in 2011. Comparison is made with international trends by collecting and analysing health accounts of OECD member countries. Particularly, financing public-private mix is parsed in depth using SHA data of both HF as financing schemes as well as FS (financing source) as their revenue types. Methods: Data sources such as Health Insurance Review and Assessment Service's publications of both motor insurance and drugs are newly used to construct the 2015 National Health Accounts. In the case of private financing, an estimation of total expenditures for revenues by provider groups is made from the Economic Census data; and the household income and expenditure survey, Korean healthcare panel study, etc. are used to allocate those totals into functional classifications. Results: CHE was 115.2 trillion won in 2015, which accounts for 7.4 percent of Korea's gross domestic product. It was a big increase of 9.3 trillion won, 8.8 percent, from the previous year. Government and compulsory schemes's share (or public share) of 56.4% of the CHE in 2015 was much lower than the OECD average of 72.6%. 'Transfers from government domestic revenue' share of total revenue of HF was 17.8% in Korea, lower than the other contribution-based countries. When it comes to 'compulsory contributory health financing schemes,' 'Transfers from government domestic revenue' share of 14.9% was again much lower compared to Japan (44.7%) and Belgium (34.8%) as contribution-based countries. Conclusion: Considering relatively lower public financing share in the inpatient care as well as overall low public financing share of total CHE, priorities in health insurance coverage need to be repositioned among inpatient care, outpatient care and drugs.

• 보건행정학회지
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• 제18권2호
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• pp.19-38
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• 2008

Financial ratios are key indicators of an organization's financial and business conditions. Among various financial indicators, profitability, financial structure, financial activity and liquidity ratios are frequently used and analyzed. Using the structural equation modeling(SEM) technique, this study examines the structural causal relationships among key financial indicators. Data for this study are taken from complete financial statements from 142 hospitals that passed the standardization audit undertaken by the Korean Hospital Association from 1998 to 2001 for the purpose of accrediting teaching hospitals. In order to improve comparability, ratio values are standardized using the Blom's normal distribution. The final model of the SEM has four latent constructs: financial activity(total asset turnover, fixed asset turnover), liquidity(current ratio, quick ratio, collection period), financial structure(total debt to equity, long-term debt to equity, fixed assets to fund balance), and profitability(return on assets, normal profit to total assets, operating margin to gross revenue, normal profit to gross revenue). While examining several model fit indices(Chi-square (df) = 178.661 (40), likelihood ratio=4.467, RMR=.11, GFI=.849, RMSEA=.157), the final SEM we employed shows a relatively good fit. After examining the path coefficient of the constructs, the financial structure of the hospital affects the hospital's profitability in a statistically significant way. A hospital which utilizes its liabilities, more specifically fixed liabilities, and makes a stable investment decision for fixed assets was found to have a higher profitability than other hospitals. Then, the standard path coefficients were examined to directly compare the influence of variables. It was found that there were no statistically significant path coefficients among constructs. When it comes to variables, however, statistically significant relationships were found. between. financial activity and. fixed. asset turnover, and between profitability and normal profit to gross revenue. These results show that the observed variables of fixed asset turnover and normal profit to gross revenue can be used as indicators representing financial activity and profitability.

• 품질경영학회지
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• 제46권4호
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• pp.959-972
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• 2018

Purpose: This study developed a simulation model that incorporates the uncertainty of demand and yield to obtain optimized results for supply chain coordination within environmental constraints. The objective of this study is to examine whether yield management for perishable products can achieve the goal of supply chain coordination between a single buyer and a single supplier under a variety of environmental conditions. Methods: We investigated the efficiency of a revenue-sharing contract and a wholesale price contract by considering demand and yield uncertainty, profit maximizing ratio, and success ratio. The implications for environmental variation were derived through a comparative analysis between the wholesale price contract and the revenue-sharing contract. We performed Monte Carlo simulations to give us the results of an optimized supply chain within the environments defined by the experimental factors and parameters. Results: We found that a revised revenue-sharing contracting model was more efficient than the wholesale price contract model and allowed all members of the supply chain to achieve higher profits. First, as the demand variation (${\sigma}$) increased, the profit of the total supply chain increased. Second, as the revenue-sharing ratio (${\Phi}$) increased, the profits of the manufacturer gradually decreased, while the profits of the retailer gradually increased, and this change was linear. Third, as the quality of yield increased, the profits of suppliers appear to increased. At last, success rate was expressed as the profit increased in the revenue-sharing contract compared to the profit increase in the wholesale price contract. Conclusion: The managerial implications of the simulation findings are: (1) a strategic approach to demand and yield uncertainty helps in efficient resource utilization and improved supply chain performance, (2) a revenue-sharing contract amplifies the effect of yield uncertainty, and (3) revised revenue-sharing contracts fetch more profits for both buyers and suppliers in the supply chain.

• Journal of the Korean Data Analysis Society
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• 제20권6호
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• pp.3037-3048
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• 2018

본 연구는 비이자부문과 이자부문간 수익채산성 대체효과가 존재하지 않는다는 최근 연구결과를 국내 은행을 대상으로 검증하기 위해 시도되었다. 또한, 본 연구는 비이자영업부문으로의 다각화가 은행의 위험감소와 관련성이 있다는 선행연구를 검증하는 작업도 함께 수행하였다. 본 연구를 통해 확인한 주요결과는 다음과 같다. 첫째, 국내 은행들은 비이자영업부문과 이자영업부문간 수익채산성 대체효과를 보여주었다. 총자산대비 비이자이익 비중이 높을수록 대출증가율, 대손충당금 비중이 감소하는 결과를 확인할 수 있었기 때문이다. 둘째, 수익채산성 대체효과는 신탁수익보다는 수수료 수익의 증가와 관련성이 있었다. 수수료 수익비중이 높을수록 대출부문 영업이 축소되는 부(-)의 결과가 확인되었기 때문이다. 셋째, 비이자영업부문으로의 다각화는 은행의 위험감소와 관련이 있으며, 비이자영업부문 성과가 높을수록 위험은 증가하지 않았다. 해당 결과는 비이자영업활동이 위험을 증가시킨다는 DeYoung, Torna(2013)의 주장을 지지하지 않는다. 결론적으로 은행들은 향후 순이자마진 감소에 대비하여 수익채산성 대체효과를 높이기 위해 수수료 수익을 높일 수 있는 비이자영업활동을 적극적으로 영위할 필요가 있다.