• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.11a
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• pp.141-168
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• 2001

본 연구는 초고속인터넷 접속서비스에서 $\ulcorner$서비스 품질$\longrightarrow$고객만족$\longrightarrow$재구매의도(고객충성도)$\lrcorner$의 일반적인 인과관계가 적용되는지를 규명하고, 고객만족, 재구매의도와 고객충성도에 영향을 미치는 서비스 품질속성을 살펴보면서, 궁극적으로 품질속성 중 고객유지와 충성도를 향상시키는 핵심 품질요소를 도출하기 위한 모형을 이론적으로 제시하고, 그 모형의 유효성을 설문조사와 이에 대한 실증분석을 통해 평가하는데 목적이 있다. 모형을 검증하기 위하여 세 단계의 분석과정을 수행하였다. 첫째, 전반적 서비스 품질과 고객만족, 재구매의도(또는 고객충성도), 그러고 고객만족과 재구매의도 및 고객충성도의 상호관계를 검증하였다. 둘째, 고객만족, 재구매의도 및 고객충성도에 영향을 미치는 선행변수인 품질속성(서비스 성능, 서비스 지원, 부가서비스, 이용요금, 과금, 절차 편리성)들의 영향력을 검증하였다. 마지막으로 공통적 개념으로 분류된 품질속성이 개별적인 품질요소의 미세한 차이를 제대로 반영하지 못하는 단점을 극복하고, 고객유지와 충성도 향상을 위한 핵심 품질요소를 도출하기 위하여 품질속성을 대표하는 품질요소들과 재구매의도와 고객충성도의 상관관계를 살펴보았다. 초고속인터넷 접속서비스 이용자를 대상으로 웹설문조사를 실시하여 총 551 개의 표본을 분석에 사용하였으며, 분석결과는 다음과 같다. 첫째, 서비스 품질은 재구매의도와 고객충성도에 비해 고객만족에 높은 설명력을 갖고 있으며, 재구매의도에 대한 서비스 품질과 고객만족의 설명력은 미미한 것으로 나타나, 고객만족이 더 높은 설명력을 갖는다는 기존의 연구와 차이를 보여 향후 추가적인 연구의 필요성이 제기되었다. 둘째, 여섯 가지의 품질속성들 중 서비스 이용과정에서 1, 2 회의 적은 경험을 하게 되는 서비스 이용절차의 편리성을 제외하곤 나머지 속성 모두 고객만족, 재구매의도 및 고객충성도의 선행변수로써 영향을 미치고 있는 것으로 나타났다. 그러나 절차 편리성은 고객충성도에 유의한 영향을 미치는 것으로 나타나, 충성도는 고객이 서비스를 총체적인 관점에서 평가하고 나타나는 행동이라는 시사점을 얻었다. 셋째, 재구매의도와 고객충성도를 결정하는 품질요소로서는 서비스 안정성, 불만사항 처리결과, 회사의 이미지, 다양한 부가서비스가 도출되었다. 본 연구의 결과는 초고속인터넷 접속서비스의 품질 및 결과변수들에 대한 인과관계를 분석하였다. 그리고 경쟁이 치열해지는 시장 환경에서 미래의 재무적 성과와 수익성을 보장하는 충성스런 고객을 확보하기 위하여 필수적으로 관리되어야 할 핵심 품질요소의 제시와 이에 따른 제언을 하였기 때문에 사업자들이 품질 및 마케팅 전략을 수립함에 있어서 이론적, 실무적 근거를 제공하여 준다.

• The Journal of the Korea Contents Association
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• v.13 no.2
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• pp.475-487
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• 2013

The aim of this study is to examine an existence of mutual interdependency in terms of military expenditure and arms imports between Northeast Asian countries such as South Korea, North Korea, China, Japan, and U.S. Recently, the mood of post cold war and intensified globalization lead to be disarmament in pursuing a policy on national defence in many countries. Since potential menace to national security has been receiving more concern rather than a direct armed clash, mutual interdependency on military spending should be fully understood. For a methodological tools, ${\beta}$ and ${\sigma}$-convergences, convergence with rational expectation, and Granger causality test are employed. Empirical evidence shows that the convergences which are evaluated by ${\beta}$, ${\sigma}$, and by a model based on rational expectation are in general revealed, and differences are more sensitive to a military decision making procedures. Granger causality, however, is not being existed. To this end, it would be concluded that the Northeast Asian countries are going with a trend in the world than forming their own tendency in this region.

• Journal of Korea Port Economic Association
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• v.34 no.4
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• pp.125-140
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• 2018

This study uses daily price data on three major types of crude oil (Brent, Dubai, and WTI) and BDI from January 2, 2009 to June 29, 2018, to compare the relationship between crude oil prices and BDI for rate of change and volatility. Unlike previous studies, the correlation between BDI and crude oil prices was analyzed both the rate of change and variability, VARs, Granger Causality Test, and the GARCH and DCC models were employed. The correlation analysis, indicated that the crude oil price change rate and volatility affect the BDI change rate and that BDI volatility affects the crude oil price change rate and volatility. The relationship between oil prices and BDI is identified, but their correlation is low, which is likely a result of lower dependence on crude oil as demand for natural gas increases worldwide and demand for renewable energy decreases. These trends could result in lower correlations over time. Therefore, focusing on the changing demand for raw materials in future investments in international shipping(real economy) and oil markets and macroeconomic analysis is necessary.

• The Korean Journal of Financial Management
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• v.22 no.2
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• pp.189-212
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• 2005

This study examines the interactions between KTB spot and futures markets using the daily prices from March 4, 2002 to January 31, 2005. We use Granger causality test, impulse Response Analysis and Variance Decomposition through vector autoregressive analysis (VAR). However, considering the long-term relationships between the level variables of KTB spot and futures, we introduced Vector Error Correction Model. The main results are as follows. According to the results of Granger-causality test and impulse response analysis, we find that the yields of KTB forward have a great influence on the change of KTB spot but not vice versa. In terms of volatility analysis, there is no inter-dependence between KTB forward and spot markets. In the variance decomposition analysis we find that the short-term KTB forward has much more impact on the KTB spot market than the long-term KTB forward does. We think these results are meaningful for bond investors who are in charge of capital asset pricing valuation, risk management and international portfolio management.

• International Commerce and Information Review
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• v.14 no.3
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• pp.307-322
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• 2012

The purpose of this paper is to examine determinants of export to the East Asia region, using panel unit root, panel cointegration framework, panel VECM (vector error correction model), panel FMOLS (fully modified OLS). Different panel unit root tests confirm that the data series are integrated processes with unit roots. When applying cointegration tests to long-run effect for aggregate panel data, a primary concern is to construct the estimators in a way that does not constrain the transitional dynamics to be similar among different countries of the panel. The regression equations are estimated by various panel cointegration estimators. The panel data causality results reveal that exchange rates has unidirectional effects on export and GDP, and there exists bidirectional causality between export and GDP. Also, the results from the panel FMOLS tests overwhelmingly reject the null hypothesis of zero coefficient. The panel cointegrating vectors show that the export has positive relationship with the GDP and ODI (overseas direct investment).

• Journal of the Korean Data and Information Science Society
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• v.26 no.6
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• pp.1387-1395
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• 2015

Since the financial crisis of 2008, the People's Republic of China has aggressively been pursuing the internationalization of the Chinese Yuan or Renminbi. In this regard, rapidly increasing use of the Chinese Yuan in the onshore and offshore markets are important milestones. This paper analyzes relationship between the onshore and offshore Chinese Yuan spot markets. Major findings of this paper are as follows : First, there is full feedback relationship between the Onshore and Offshore Chinese Yuan Markets. Second, the difference between the yuan's offshore exchange rate and the onshore was getting tight. Third, the offshore Yuan market affects on the onshore market based on the empirical tests.

• Industry Promotion Research
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• v.8 no.2
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• pp.29-36
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• 2023

Summary This study summarizes the results of analyzing 410 questionnaires from October 15 to October 26, 2022 on the impact of ESG management of SMEs on organizational productivity improvement. First, all areas except for clarity of promotion, validity of content, efficiency of method, sub-areas of employee friendliness and productivity improvement, which are sub-areas of ESG management, labor welfare, job satisfaction, and employee "favorability, retention attitude" among organizational management. Since there is a correlation in , work efficiency can be maximized by appropriately adjusting sub-variables of ESG management. Second, it can help an organization prioritize for productivity improvement through the zodiac correlation. The causal analysis showed that clarity of promotion (β=.342) and validity of content (β=.276) had the most influence. Third, from ESG management. The correlation between clarity of promotion, validity of content, efficiency of method, friendliness of employees and organizational management showed a high correlation at .719, and causal analysis showed that efficiency of method (β=.455) and friendliness of employees (β= .217) was found to have an influence on organizational management, which indicates that personnel organization management is necessary to increase the efficiency of the method (β=.455). This study is meaningful in revealing the causal relationship between ESG management performance and productivity improvement in the middle.

• Korean Chemical Engineering Research
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• v.58 no.3
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• pp.408-415
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• 2020

In this study, the AE-SOM method, which combines auto-encoder and self-organizing map, is used to detect and diagnose faults in EVA production process. Then, the fault propagation pathways are identified using Granger causality test. One year and seven months of operation data were obtained to detect faults of the process, and the process variables of the autoclave reactor are mainly analyzed. In the data pretreatment process, the data are standardized and 200 samples of each grade are randomly chosen to obtain a fault detection model. After that, the best matching unit (BMU) of each grade is confirmed by applying AE-SOM. The faults are determined based on each BMU. When a fault is found, the most causative variable of the fault is identified by using a contribution plot, and the fault propagation pathway is identified by Granger causality test. The prognostic of the two shutdowns is detected, and the fault propagation pathway caused by the faulty variable was analyzed.

• Journal of the Korean Data and Information Science Society
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• v.27 no.6
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• pp.1573-1583
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• 2016

It is necessary to check mutual correlations between related variables because housing prices are influenced by a lot of variables of the economy both internally and externally. In this paper, employing the Granger causality test, we have validated interrelated relationship between the variables. In addition, there is cointegration associations in the results of the cointegration test between the variables. Therefore, an analysis using a vector error correction model including an error correction term has been attempted. As a result of the empirical comparative analysis of the forecasting performance with ARIMA and VAR models, it is confirmed that the forecasting performance by vector error correction model is superior to those of the former two models.

• Proceedings of the Korean Society for Cognitive Science Conference
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• 2006.06a
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• pp.125-130
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• 2006

원활한 의사소통을 위해서는 문장들을 연결하여 흐름을 조직하고 말로 산출하고 전체적인 의미를 파악할 수 있어야 한다. 이야기는 이러한 문장들이 연결되어있는 것으로, 종속적이거나 나열적인 이야기 특성은 의사소통장애인의 이야기 이해와 산출의 수행에 영향을 미칠 수 있다. 본 연구에서는 이야기 특성에 따른 유창성 실어증환자의 이야기 이해 및 산출의 능력을 알아보고, 이해과제 수행이 산출과제에 미치는 영향을 분석해보았다. 이야기 종류로는 시간적 나열 이야기와 인과적 관계 이야기, 유머가 있는 이야기를 사용하였으며, 사실적 정보, 텍스트 추론, 빠진 정보추론 등 세 가지의 이해과제를 통하여 이해 능력을 측정하였다. 산출능력은 이해과제 전과 후에 CIU 비율로 질적인 측면을 측정하고, 분당어절 수를 이용하여 양적인 측면을 분석하였다. 그 결과 이해측면은 세 가지 이야기 모두 사실적 정보에 대한 이해 능력이 상대적으로 좋았으며, 오류의 형태는 추론오류가 가장 많이 나타났다. 산출에서는 인과적 관계이야기에서의 CIU 비율이 가장 높았고, 이해과제 전, 후의 차이를 비교한 결과, CIU 비율은 변화하지 않았으나, 분당 어절수에서는 증가하고 있음을 보여주었다. 이야기의 종류에 따라서 유창성 실어증화자의 산출과제의 수행수준은 다르게 나타났다. 그리고 이해과제의 수행이 산출과제에서 양적인 증가는 가져왔으나 질적인 수준에는 아무런 영향을 미치지 않았다.