• 경영과정보연구
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• 제36권3호
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• pp.239-254
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• 2017

본 연구는 기업들이 기업가치를 높일 수 있는 방안으로 제시하고 있는 연구개발비 지출과 특허권을 가지고 그들의 관계 및 기업가치의 관련성을 살펴보고자 한다. 구체적으로 연구개발비와 특허권의 관계를 살펴보고, 두 변수가 기업가치에 미치는 영향력에 차이가 나는지를 보고자 한다. 본 연구의 기간은 2005년부터 2016년까지이며, 특허권 취득기업을 포함한 연구에 사용된 기업표본은 총 333개 기업으로 구성되어진다. 연구결과는 다음과 같다. 첫째, 비용화된 연구개발비와 자본화된 연구개발비는 특허권과 유의적인 양(+)의 방향을 나타내는 것으로 나타났다. 둘째, 연구개발비 더미(RDD) 변수를 사용한 결과 연구개발비를 적게 투자한 기업보다 많이 투자한 기업의 가치가 높게 나타났다. 즉 연구개발비를 많이 지출한 기업일수록 기업가치와는 유의적인 양(+)의 결과를 보였고, 특허권더미(PATD) 변수도 연구개발비와 유사한 결과를 나타내었다. 셋째, 연구개발비 더미와 특허권 더미를 사용한 차이분석에서는 특허권과 연구개발비를 많이 투자한 기업의 기업가치가 높은 것으로 나타났다. 본 연구의 공헌점은 특허권을 취득한 기업을 대상으로 연구개발비 투자에 대한 기업가치의 관련성을 살펴본 것이라 하겠다. 반면 특허권을 표본으로 하는 다양한 변수가 존재할 수 있는데 특허의 취득건수만을 표본으로 잡은 점을 연구의 한계점으로 들 수 있다.

• 대한토목학회논문집
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• 제3권2호
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• pp.119-126
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• 1983

본(本) 연구(硏究)의 목적(木賊)은 특급(特急)과 고속(高速)버스 이용자(利用者)의 수단선정행태(手段選定行態)(mode choice behavior)를 분석(分析)하고 모형(模型)을 개발(開發)하여 교통정책결정(交通政策決定)의 자료(資料)를 제공(提供)하는데 있다. 기본자료(基本資料)로는 1980년(年) 3월(月)부터 1981년(年) 11월(月)까지의 서울과 지방(地方) 19개도시간(個都市間) 수단별(手段別) 수송실험(輸送實驗)이 수집(收集)되었으며, 여행시간(旅行時間), 여행비용(旅行費用), 평균배차간격(平均配車間隔), 1일운행시간(日運行時間), 수단별(手段別) 가변수(假變數)를 변수(變數)로 하고 선형(線形) 및 대수효용함수(對數効用函數)를 이용(利用)한 Logit모형(模型)에 의하여 분석(分析)되었다. 본(本) 연구(硏究)의 결과(結果), 본문(本文) 식(式) 2.의 Type I 모형(模型)에서 가장 좋은 결과(結果)를 얻었으며, Group III, IV의 매개상수(媒介常數)가 최적(最適)으로 판단(判斷)된다. 추정(推定)된 매개상수(媒介常數)중 "${\beta}$"의 값이 가장 신뢰(信賴)할 수 있었으며, 10, 11월(月)에는 특급(特急)보다 고속(高速)버스를 선호(選好)하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.863-867
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• 2020

This study was conducted on financial data of 38 economic groups listed on Vietnam's stock market for the period 2009 - 2019 and it aims to provide an empirical evidence on the impact of working capital management policy on performance in all phases of the economic cycle of Vietnamese economic groups. The study uses FGLS estimation method with 2 dependent variables ROA, GOP, independent variables including INV, AR, AP, CCC, dummy variable representing different phases of the economic cycle, variables Control includes CAT, CR, LEV, SZ, GR. Research shows that the greater the level of investment by companies in liquid assets corresponding to a certain level of activity (shown by average days of inventory (INV), average days of collection. (AR), cash flow cycle (CCC)) the lower the rate of return on assets. The study also provides additional evidence of the negative effects of economic crisis on the performance of economic groups. The study also shows that the number of short-term asset cycles has a positive impact on operational efficiency, and the level of debt use has a negative impact on operational efficiency. This result implies that the managers of economic groups can increase the efficiency of businesses through a reasonable working capital policy.

• 한국중재학회지:중재연구
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• 제26권2호
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• pp.91-114
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• 2016

The purpose of this study is to promote trade between Korea and South American countries. Korea's trade with South America has decreased recently. This study analyzed the effects of arbitration on trade between Korea and South America. To this end, we conducted an analysis of the gravity model of trade between Korea and South America. The gravity model is a research method that is widely used to analyze the pattern of international trade. The dependent variables of the gravity model were trade in Korea and South America. The independent variables were GDP, population, and distance between Korea and South America. In addition, dummy variables were the FTA and whether to join the New York Convention or Washington Convention. Joining either Convention indicated the establishment of an international arbitration system. As a result, an arbitration system appeared to be effective in increasing trade. Depending on the results it shows the importance of utilizing the system of arbitration in South America. So this study analyzed the current status of arbitration in South America. To companies doing business in South America it provided the implications for an arbitration system there. Also it proposed a method for increasing trade for the Korean government and institutions.

• 동남아시아연구
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• 제20권3호
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• pp.41-64
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• 2010

The recent global financial crisis triggered by the sub-prime mortgage debacle in the United States hit hard most ASEAN countries that have just recovered from the unprecedented economic crisis ten years ago. This paper, using individual time-series and panel data from 1990 to 2009, intends to investigate and compare the impacts of the two aforementioned economic crises on trade in the four developing ASEAN countries that encompass Indonesia, Malaysia, the Philippines and Thailand. In doing so, the paper traces the behaviors of main macroeconomic variables before and after the crises on graphs, and then estimates classical export and import demand functions that include real exchange rate, home and foreign GDPs as explanatory variables. In the estimation functions, two dummy variables are added to consider the effects of the two economic crises separately. Individual country data analyses reveal that by and large the 1997 economic crisis seems hit those ASEAN countries' exports and imports harder than the recent global financial crisis. Surprisingly the recent financial crisis turns out more or less statistically insignificant for those countries' export and import performances. The fixed effect model estimation using panel data of those four ASEAN countries also shows that the 1997 economic crisis had affected exports and imports of those countries negatively while the recent global financial crisis was not statistically significant. These results indicate that overall the effect from the 1997 crisis was more devastating than that of the recent global crisis for those ASEAN countries.

• Asia pacific journal of information systems
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• 제30권3호
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• pp.590-613
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• 2020

As a part of advanced technology society, South Korean youth have been accessing the Internet at a very high pace. The Internet overuse could yield addiction where may be a serious psychological disorder of this century. The literature remarks that gender could make a significant difference on internet addiction. Therefore, this study aims to examine the effect of gender variable on internet addiction for a sample of South Korean university students (n = 815; 312 females and 503 males). The instrument had two sections; the demographics and twenty Internet Addiction survey items based on a five level scale; "Rarely, Occasionally, Frequently, Often and Always". The results showed that general tendency among the participants appeared between "Occasionally" and "Frequently" for internet addiction. In order to test five derived study hypotheses, the researchers conducted comparative statistical tests. The t-tests revealed that gender made statistically significant differences on nineteen items where males were higher than females showing that males significantly spend more time on the Internet than females. Additionally, t-tests results showed that seventeen of the survey items showed statistically significant differences with respect to types of technology dominant environment. The researchers created two dummy variables to combine gender and technology dominant environment variables and gender and school year variables, to have a better understanding the gender effect with one-way ANOVA. The gender difference still exists following its merge to technology dominant environment showing that the gender surpasses IT related environment. When school year combines to gender, males show higher scores for certain items, especially for freshman year.

• 한국학교보건학회지
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• 제28권1호
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• pp.1-9
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• 2015

Purpose: The purpose of this study is to examine the effect of sleep duration on suicidal ideation in Korean adolescents. Methods: This study used the data drawn from Korea Youth Risk Behavior Web-Based Survey in 2013. A total data of 63,301 adolescents were included in the analysis. Included variables were general characteristics, health status variables, hours of sleep, and suicidal ideation. For sample description weighted percentage and means were used. Rao-Scott ${\chi}^2$ test and simple and multiple logistic regression with dummy variables were conducted with use of SAS 9.2. Results: Among general characteristics and health status variables, gender, grade, school level, school achievement, family's economic status, living with parents, subjective health, happiness, stress, and feeling of despair were found to be significantly related to suicidal ideation. Rates of having suicidal ideation were 22.4% in the case of students with less than 5 hours of sleep and 12.9% in students with 8 or more hours of sleep. After controlling general characteristics and subjectively perceived variables, hours of sleep was still significantly related to suicidal ideation. That is, compared to adolescents with 8 hours or more of sleep, those with less than 5 hours of sleep showed significantly higher risk for having suicidal ideation (adjusted odds ratio: 1.20, p<.001). Conclusion: These findings suggest that short sleep has negative effects on psychological health in adolescents. Particularly, less than 5 hours of sleep has harmful effect on adolescents' increased risk for having suicidal ideation.

• 수산경영론집
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• 제48권2호
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• pp.1-17
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• 2017

This work studies the variability of flatfish sales revenue. The theoretical analysis draws functions for equilibrium price and quantity using expectation hypotheses. The functions include unpredictable phenomenon with dummy variable and GARCH. The equilibrium function, using adaptive expectation hypothesis, contains the independent variables of supply and demand, while the equilibrium function, embodying rational expectation hypothesis, includes only the independent variables of supply side, because the demand side disappears by the information extraction process theoretically, if economic subjects build the expectation rational. The empirical analysis shows: the variability of flatfish production has a spillover effect on the variability of revenue with the adaptive expectation hypothesis. In the case when the model has a rational expectation hypothesis, the variability of flatfish production has a spillover effect on the revenue (the mean equation of GARCH model). This study indicates that there is the variability in flatfish production and sales revenue, and the spillover effect between them. The result can help to build of the rational system for the fishery income stability.

• 보건의료산업학회지
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• 제10권4호
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• pp.97-107
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• 2016

Objectives : This study aims to : (i) characterize and differentiate between two different periods of baby boomers, (ii) study the utilization of their health care services, and (iii) establish effective ways of providing better health service utilization and preventive policy strategies for upcoming and older generations. Methods : A multiple regression analysis using descriptive statistics, frequency analysis, and dummy variables was utilized to access the presence of correlations between socio-demographic factors and health care service utilization. Results : Medical insurance type, marital status, and chronic disease were factors that influenced health care service utilization. Furthermore, the factors that influenced individual medical expenses were cohabitation, inpatient days, and chronic disease. Conclusions : Primary findings and exploratory statistics revealed that there were strong correlations and interaction among some of the predictor variables. Because of the chronologically limited nature of the sample data set gathered in 2012, it would be helpful to continue to develop or research related constructs that may capture relationships more effectively among extended populations.

• Journal of Korean Biological Nursing Science
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• 제14권3호
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• pp.203-211
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• 2012

Purpose: The purpose of this study was to investigate effects of obesity on self-rated health in Korean males and females. Methods: The 2010 Korean National Health and Nutrition Examination Survey (KNHANES V-1) data were used. Participants included 1,231 males and 1,289 females aged 20 years or older and had no disease. Chi-square test, t-test, and multiple logistic regression with dummy variables using SAS 9.2 were performed. Results: From univariate analysis, total body fat was significantly greater in males with a self-perception of poor health (p=.006), and the percentage of total body fat was significantly greater in males and females with a self-perception of poor health (p for all=.001). After controlling for demographic and health behavior variables, similar results were found. Females with higher education had a healthy perception of their health. Smoking for males and drinking for females were significantly related to unhealthy perception of their health. Conclusion: The current study provides evidence that obese Korean males and females had worse self-rated health, even though they had no disease. In particular, it is important to note that the relatively direct obesity measures from Dual Energy X-Ray Absorptiometry, such as total body fat and percentage of body fat, were significantly related to self-rated health.