• Communications for Statistical Applications and Methods
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• 제23권6호
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• pp.555-562
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• 2016

Interval censored data often occur in an observational study where the subject is followed periodically. Instead of observing an exact failure time, two inspection times that include it are available. There are several methods to analyze interval censored failure time data (Sun, 2006). However, in the presence of competing risks, few methods have been suggested to estimate covariate effect on interval censored competing risk data. A sub-distribution hazard model is a commonly used regression model because it has one-to-one correspondence with a cumulative incidence function. Alternatively, Klein and Andersen (2005) proposed a pseudo-value approach that directly uses the cumulative incidence function. In this paper, we consider an extension of the pseudo-value approach into the interval censored data to estimate regression coefficients. The pseudo-values generated from the estimated cumulative incidence function then become response variables in a generalized estimating equation. Simulation studies show that the suggested method performs well in several situations and an HIV-AIDS cohort study is analyzed as a real data example.

• 디지털융복합연구
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• 제15권8호
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• pp.33-43
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• 2017

특허전략연구는 경영전략, 기술전략과 연계된 특허전략을 수립하고, 이를 구체화하기 위해 특허 Idea 발굴에서 출원 관리, 제품 및 개발과제의 조사/분석과 활용을 위한 라이선싱 등을 효율화하는 논의에 집중해 왔다. 그러나 수립된 특허 전략의 내재화 및 성과를 높이기 위한 기업 고유의 문화를 고려하거나 이를 반영한 특허전략 수립 연구는 매우 부족하였다. 그 결과 기업들은 업종과 조직문화가 고려되지 않은 일류 선진 기업의 특허전략을 자사 전략으로 모방하는 정도에 머물고 있었다. 이에 본 논문에서는 조직문화를 4개의 프레임워크로 구분하는 경쟁가치모형(Competing Value Model)을 바탕으로 기업의 특허전략 모형을 제안한다. 사례 연구를 통해 특허전략 유형을 검증하고 기업의 조직문화에 따른 적합한 특허전략을 제시한다. 본 연구는 특허전략에 대해 새로운 관점인 조직문화 이론을 바탕으로 논의하였다는 점과 실무적 활용성이 높은 전략모형을 제시한다는 점에서 의의를 가진다.

• 유통과학연구
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• 제16권4호
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• pp.83-88
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• 2018

Purpose - This study conducts an empirical analysis on gasoline pricing of Korean retail gas stations focusing on spatial effects. Unlike previous studies, the study uses an official land price for a proxy of the importance of location, and also allows the spatial effects from other competing gas stations as well. Research design, data, and methodology - In collection of data, we obtain more abundant data than those of previous studies. The gasoline prices used in the study are 909,084 observations as daily data from January 1 to July 31 of the year 2016. A proxy for the land price is collected by linking official public land price data with address information on each gas station. For the estimation, the study employs the Panel Spatial Dubin Model to make the best use of the collected location information. Results - As expected, spatial properties of gas stations have significant effects on the gasoline price. As the price per square meter increases by 100 thousands won, the price of gasoline rises 9 won per liter. Among other characteristics, the price increases by 16 won per liter if the station has a convenience store, and about 5 won if it has a car wash service. Gasoline price in Singapore accounted for 26% of variations in domestic gasoline prices. SK Energy and GS Caltex are the top brands in terms of price. The study also finds prices and other important properties of competing gas stations have significant effects on others' prices. Prices of competing gas station have a positive relationship with those of others. If a competing gas station raises the price, the gas station also raises the price, and lowering the price lower the price. Among brands, GS Caltex has the greatest downward pressure on nearby gas stations. Conclusions - The study confirms that location value of gas stations affect their gasoline prices, and the prices of the competing gas stations also have a significant effects on their prices. It suggests that the prices in the competing retail areas tend to be synchronized with each other.

• 한국조리학회지
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• 제13권2호
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• pp.163-173
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• 2007

The purpose of this study is to measure the effects of behavioral intention. A total of 273 questionnaires were completed. The equation model was used to measure the causal effect. The results demonstrated that the confirmatory factor analysis model provided an excellent model fit. The comprehensive model yielded a significantly better fit to the data and accounted for a greater share of the variance in behavioral intentions than the five competing models. The effects of satisfaction, perceived value and service quality on behavioral intention were statistically significant. As expected, service quality and value had significant effects on satisfaction. Service quality and perceived sacrifice had significant effects on value. Moreover, service quality and value perceptions had an indirect influence on behavioral intentions. The overall findings offer strong empirical support for the intuitive notion that improving service quality can increase favorable behavioral intentions and decrease unfavorable intentions.

• 보건행정학회지
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• 제21권2호
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• pp.213-248
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• 2011

Past studies on organizational accountability have had similar limitations. First, empirical evidence of organizational accountability is rare as the majority of research takes a conceptual approach of the topic. Only a few of these studies are applicable to health care organizations (HCOs). To fill these gaps, we attempted to develop a model for analysis of organizational accountability for HCOs. Accountability for HCOs was conceptualized by two axes: answerability(X, horizontal) and value-creation(Y, vertical). Our concept building could relieve competing accountability mechanism which past studies stressed. Four elements of accountability(legal, economical, social, and clinical) were applied to specify each of the two features of organizational accountability. And then four types of accountability behavior were coordinated by this x-y axis : high A/high VC, high A/low VC, low A/high VC, low A/low VC. Finally, a multidimensional model of HCOs' accountability, enabling an empirically testable multi-level analysis, was proposed.

• 한국콘텐츠학회논문지
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• 제16권5호
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• pp.497-508
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• 2016

본 연구의 목적은 조직문화가 조직에서의 구성원들의 주관적 행복에 미치는 영향을 알아보는 것이다. 이를 위하여 직장인 142명을 대상으로 조직에서 경험하는 조직문화와 주관적 행복에 대하여 조사하였다. 이를 측정하기 위해, 조직문화는 Quinn과 Kimberly의 경쟁가치모형(Competing Value Model)을 사용하였으며, 주관적 행복은 한국적인 문화적 특성을 반영할 수 있도록 개발된 단축형 행복 척도(COMOSWB)를 사용하였다. 그 결과로 첫째, 조직문화는 조직에서의 주관적 행복에 유의한 영향을 미치는 것으로 나타났으며(p<.001), 조직문화가 주관적 행복을 28.4% 설명하는 것으로 나타났다. 조직문화 중에서 유일하게 집단 문화만이 주관적 행복에 정적인 영향(p<.001)을 미쳤다. 반면에 위계문화, 개발문화, 합리문화는 주관적 행복에 유의한 영향을 미치지 못하는 것으로 나타났다. 둘째, 또한 조직문화는 주관적 행복의 하위 요인인 삶의 만족(p<.001), 긍정정서(p<.001), 부정정서(p<.05)에 유의한 영향을 미치며, 각각 35.3%, 26.0%, 5.1%의 설명력을 가졌다. 조직문화 중에서 유일하게 집단문화만이 삶의 만족에 정적인 영향(p<.001)을, 긍정정서에 정적인 영향(p<.001)을 미쳤고, 부정정서에는 부적인 영향(p<.01)을 미친 것으로 나타났다. 이 결과를 바탕으로 이론적 실제적 시사점과 향후 연구에 대한 제안점을 제시하였다.

• 한국산학기술학회논문지
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• 제14권1호
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• pp.135-142
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• 2013

본 연구는 사회복지기관의 조직문화가 구성원들의 조직시민행동에 어떠한 영향을 미치는지 알아보고 조직문화와 조직시민행동 간의 관계에서 직무만족의 매개효과를 검증하기 위해 실시한 것으로, 조직문화는 Kimberly and Quinn의 경쟁가치모형(competing value model)을 바탕으로 네 가지 유형으로 측정하였다. 자료 수집은 사회복지기관 종사자 260명을 대상으로 구조화된 설문자료를 분석하였다. 연구 결과, 사회복지기관의 조직문화, 조직시민행동 및 직무만족은 모두 중간값 이상의 수준을 보여주고 있고, 회귀분석 결과에서 조직문화와 직무만족 모두 조직시민행동에 긍정적인 영향을 미치는 것으로 나타났으며 특히 직무만족의 영향력이 더 높게 나타났다. 또한 직무만족의 매개효과가 유의한 수준에서 네 가지 조직문화 유형 모두에서 확인되었다. 이는 조직문화 수준이 낮더라도 직무만족 수준을 증진시킨다면 조직시민행동이 높아질 수 있다는 것을 의미한다. 이러한 결과를 바탕으로 구성원들이 조직을 위해 자발적으로 헌신하도록 하기 위해 직무만족 향상이 매우 중요함을 알 수 있다.

• 경영과학
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• 제25권1호
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• pp.139-147
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• 2008

Conjoint Analysis is marketers' favorite methodology for finding out how buyers make trade-offs among competing products and suppliers. Thousands of applications of conjoint analysis have been carried out over the past three decades. The conjoint analysis has been so popular as a management decision tool due to the availability of a choice simulator. A conjoint simulator enables managers to perform 'what if' question accompanying the output of a conjoint study. Traditionally the First Choice Model (FCM) has been widely used as a choice simulator. The FCM is simple to do, easy to understand. In the FCM, the probability of an alternative is zero until its value is greater than others in the set. Once its value exceeds that threshold, however, it receives 100%. The LOGIT simulation model, which is also called as "Share of Preference", has been used commonly as an alternative of the FCM. In the model part worth utilities aren't required to be positive. Besides, it doesn't require part worth utilities computed under LOGIT model. The simulator can be used based on regression, monotone regression, linear programming, and so on. However, it is not free from the Independent from Irrelevant Alternatives (IIA) problem. This paper proposes the EBA (Elimination-By-Aspects) model as a useful conjoint-like method. One advantage of the EBA model is that it models choice in terms of the actual psychological processes that might be taking place. According to EBA, when choosing from choice objects, a person chooses one of the aspects that are effective for the objects and eliminates all objects which do not have this aspect. This process continues until only one alternative remains.

• 경영과정보연구
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• 제15권
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• pp.223-244
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• 2004

E-business is one of business innovations to get competitive advantage over other competing companies by utilizing information technology which can make to enhance the efficiencies and effectiveness through connecting one or several value activities. E-transformation is the process of business innovation to trans brick and motor companies to brick and click companies to accomodate e-business environments by means of digitalizing business strategy, business system, business process, and company cultures. In this results, the company can develop entirely new value chain of business and render enhanced services to customers. In this paper, I will represent several e-transformation evaluation models which are used to realize e-transformation(trans from brick and motor companies to brick and click companies). Also, I propose the strategic thrust model, which is composed of strategic targets (customer, suppliers, partners) and strategic tools(technology innovation, integration). This model is differentiated with evaluation models in that it can capture the rapidly changing business environments, especially strategic targets(customers, suppliers, partners).

• Asian Journal of Business Environment
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• 제1권1호
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• pp.9-12
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• 2011

This study aimed to predict retail sales of local markets in Jinan city of China with the Huff model. Using the Huff Model, we examined whether the predicted retail sales of local markets may be different in Jinan, China, from the department stores, supermarkets, shopping centers/shopping malls, and home appliance stores. The probability that a customer shops at location depends upon the store size and the travel time factors calculated by the Huff Model. We found that the predictedretail sales of shopping malls have a greater value than others. People who live in a mid-sized city may have easier access to any stores within the city boundary than people in metropolitan areas. Therefore, people in a mid-sized city are more sensitive to store size, because a bigger store size means greater opportunities, incentivizing consumers to travel further to competing stores after passing by nearer, smaller stores. This study has some limitations. First, the data is somewhat restricted in that the subject stores do not represent all of the stores in Jinan. Second, we cannot compare the estimated market share of the stores and the actual sales data. It is further suggested in this study that more databases be developed throughout such East Asian countries as Korea and Japan and that a different parameter λ value in the Huff Model be utilized for mid-sized cities.