• The Korean Journal of Financial Management
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• v.9 no.2
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• pp.57-75
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• 1992

본 논문은 10개의 기업규모별 자산을 대상으로 최근에 발전된 계량기법인 GMM(generalized method of moments)을 이용하여 베타(beta)를 추정하였다. 분석대상기간으로 $1982.1{\sim}1991.4$사이의 월별자료를 사용한다. 실증분석 결과에 의하면, 기업규모별 구분에 따른 자산의 경우에 규모가 큰 기업보다 규모가 작은 기업의 베타가 상대적으로 작은 것으로 나타났다. GMM의 추정을 위한 수단변수로 회사채수익률과 정기예금금리의 금리차, 분석대상이 되는 자산 수익률과 시장포트폴리오의 자기시차, 그리고 상수가 사용되었다. OLS를 사용한 CAPM추정 결과에 비해 GMM을 사용한 추정 결과가 우월할 수 있음을 보여주고 있는데, 이것은 GMM에 사용된 수단변수들이 수단변수를 포함시킴으로써 관련자산들의 자기시차가 아닌 CAPM추정에 필요한 유용한 대용변수(代用變數)(proxy)를 제공하였고, 나아가 GMM이 잔차항(殘差項)의 자기상관(自己相關) 뿐만 아니라 조건부(條件附) 이분산(異分散)(conditional heteroskedasticity)을 잘 설명하고 있기 때문인 것으로 판단된다. t값 및 P-value에 의하면 GMM을 사용한 단순 CAPM 추정이 우리 나라의 현실경제와 잘 부합될 수 있음을 암시한다.

• The Korean Journal of Financial Management
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• v.15 no.2
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• pp.279-337
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• 1998

이 논문에서는 주가가 확률과정, 즉 확률미분방정식에 의하여 생성되는가를 검정하고 주가의 운동법칙을 규명한다. 일별종합주가지수가 양수의 완전시계열상관을 갖고 있으며, 더욱이 3년 정도의 시차까지 의미있는 시계열상관을 갖고 있음이 발견되었다. 수익률과 가격변화의 시계열상관도 존재하고 시계열은 정상성(定常性)을 갖고 있다. 마팅게일에 의하여 주가가 생성되고있지 않음이 밝혀졌다. 한국증권거래소에서 계산하고 있는 일별 종합주가지수를 포함한 41개 산업별 지수를 사용하여 자본시장의 운동법칙을 규명하기 위하여 가장 많이 이용하고 있는 세개의 확률미분방정식을 검정하였다. 각 주가지수들이 온스타인 울렌벡 브라운 운동과정과 평균회귀과정을 따르지 않고 있다는 것이 발견되었다. 그러나 주가가 편류를 갖는 일반 기하 브라운 운동과정에 의하여 생성되고 있음이 검정을 통하여 확인되었다. 평균회귀과정에 의하여 주가가 생성되지 않는다는 발견은 의외라 할 수 있다. 주가가 온스타인 울렌벡 과정을 따르지 않는다는 것은 주가가 제 1계 정상적 자기회귀과정이 아니라는 것을 의미한다. 일별종합주가지수는 제 4계 자기회귀과정에 의하여 생성된다. 가격변화와 수익률의 생성함수는 제 4계 자기회귀과정이다. 종합주가지수의 제 1계 시계열상관계수는 1이다. 상당히 큰 시차를 갖을 때까지 시계열상관이 대략적으로 1을 유지하고 있다. 따라서 지수가 마팅게일을 따르고 있지 않다. 이 점은 가격변화와 수익률에 있어서도 유사하다. 가격변화, 수익률, 대수수익률의 제 1계 시계열상관이 0.1로 유의적이다. 따라서 수익도 마팅게일 과정을 따르고 있지 않다. 증권가격은 세 번에 걸쳐 구조의 번화가 발생하였다. 구조의 변화가 발생할 때마다 평균가격이 상승하였다. 이와 같은 현상은 장기적 기대가격이 미지일 가능성이 배제되지 않는다. 단기적 기대 주가가 알려진 반면 장기적 기대 주가가 미지라면 평균회귀과정은 장기적 기대주가로 회귀하고 있는 과정이므로 장기기대 주가의 미지성이 평균회귀 과정의 기각을 유도하게 된다. 우리나라의 투자자들은 무위험자산과 위험을 동시에 고려하여 투자활동을 전개하고 있음이 발견되었다. 선형의 효용함수를 갖는 위험중립적 태도의 투자자가 아니다. 위험기피형 효용함수 아래에서 투자활동을 수행하고 있는 합리적 투자자들이라 할 수 있다. 뿐 만 아니라 자신의 평생에 걸친 소비를 소비가 이루어지는 각 기마다 가급적 일정하게 하는 소비행동을 목표로 삼고 소비와 투자에 대한 의사결정을 내리고 있음이 실증분석을 통하여 밝혀졌다. 투자자들은 무위험 자산과 위험성 자산을 동시에 고려하여 포트폴리오를 구성하는 투자활동을 행동에 옮기고 있다.

• International Area Studies Review
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• v.22 no.3
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• pp.201-219
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• 2018

This paper suggested a theoretical model, in which a security-based(secured loan, non-secured loan) credit agreement determines the form of corporate cost function through a loaning company's cost minimization in the light of a company which behaves monopolistically in product markets. Also, this paper analyzed the influence of a corporate credit agreement on market equilibrium, and economic welfare in product markets. As a result, it was found that in case a company, whose equity capital is small, implements borrowing based on a secured loan from a financial institution, the company comes to face borrowing restraints, in which the company has no choice but to get a loan within the scope of securities. When a company offers its capital goods, i.e. a production factor, as a security, there occurs a distortion to the production factor input ratio. Meanwhile, when a company comes to get a loan based on an unsecured loan, for which the interest rate is high, marginal cost rises; accordingly, the company comes to choose a credit agreement aiming at maximizing its profits. However, a company's choice of a credit agreement is not quite desirable from a consumer's viewpoint, and from the whole economic point of view; overall, such a choice is likely to aggravate economic welfare.

• Journal of Digital Convergence
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• v.18 no.11
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• pp.319-328
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• 2020

This study aimed to investigate the relationships between basic pychological needs, positive psychological capital, authentic leadership and psychological burnout of clinical nurses, and to identify the mediation effect of positive psychological capital and moderated mediation effect of authentic leadership. The participants were 182 clinical nurses at 5 general hospital located in M city from April 2020 to June 2020 by questionnaire survey. Data analysis was done by using SPSS WIN 23.0 program and SPSS PROCESS MACRO program(model 4 and model 7). This study shows that the basic psychological need had an negative effect on psychological burnout, and the mediating effect of positive psychological capital and the moderated mediating effect of authentic leadership were confirmed in the relationship between basic psychological need and psychological burnout. Therefore, in order to reduce psychological burnout of general ward nurses, it is necessary to develop strategy to improve basic psychological needs and positive psychological capital of nurses, and leadership program for authentic leadership of nurse managers.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.267-274
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• 2020

This study examines the relationship between retirement preparation, positive psychological capital and successful aging for retirees and retirees, promotes successful aging of retirees and retirees, and increases positive psychological capital to increase desirable retirement time. I want to find a direction I can have. This study was conducted on 537 retirees and retirees who were preparing for retirement or retired from across the country as a structural relationship analysis, and the data collection period was from April 1 to April 20, 2019. As for the data, frequency analysis, correlation analysis, and structural relationship analysis were performed using SPSS 20.0 and AMOS 9.0. As a result of the study, retirement preparation of retirees and retirees had a negative relationship with successful aging, and retirement readiness had a positive effect on self-acceptance of successful aging and autonomous life as mediators of resilience of positive psychological capital and self-efficacy. This means that the positive psychological factors of positive psychological capital have a positive effect on retirees and retirees who are struggling with anxiety about retirement preparations, enabling a successful retirement life. Therefore, when operating a retirement preparation program, it is necessary to organize and operate a program that can expand positive psychological capital.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.16 no.6
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• pp.43-55
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• 2021

Recently, as the domestic job problem has become serious, government ministries are investing a lot of budgets to encourage startups by prospective entrepreneurs. What is important to the success of startups is the recognition of various startup opportunities before starting a startup, and the experience through trial. However, in reality, prospective entrepreneurs recognize and seek various startup opportunities through support such as startup education and initial commercialization funds through various government supported projects, but it is difficult to actually start a business. Previous studies have revealed that the recognition of entrepreneurial opportunities affects entrepreneurial intentions by various variables such as gender, but research is insufficient on what kind of black box exists between the recognition of entrepreneurial opportunities and entrepreneurial intentions. The purpose of this study is to emphasize the importance of positive psychological capital as a major method for improving the entrepreneurial intention, and to analyze exploratorily whether positive psychological capital plays a mediating role between the recognition of entrepreneurial opportunities and the entrepreneurial intention. As a result of the study, it was confirmed that the recognition of startup opportunities affects the intention to start a business, and positive psychological capital has a mediating effect between the recognition of the startup opportunity and the intention to start a business. This means that positive psychological capital is important in order to lead to actual entrepreneurial intentions after recognizing a startup opportunity. Therefore, in order to revitalize the startups of prospective entrepreneurs in the current startup ecosystem, it is necessary to prepare a plan to improve the recognition of startup opportunities and positive psychological capital.

• Economic Analysis
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• v.27 no.3
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• pp.1-32
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• 2021

This study empirically analyzes whether bank capital channel and risk-taking channel for monetary policy work for domestic banks in South Korea by analyzing the impact of the expansionary monetary policy on the rate spread between deposit and loan, capital ratio, and loan amount. For the empirical analysis, the Uhlig (2005)'s sign-restricted SVAR(Structural Vector Auto-Regression) model is used. The empirical results are as follows: the bank's interest rate margin increases, the capital ratio improves, risk-weighted asset ratio increases, and the amount of loans increases in response to expansionary monetary shock. This empirical results confirm that bank capital channel and risk-taking channel work in domestic banks, similar to the previous research results. The implications of this study are as follows. Although the expansionary monetary policy has the effect of improving the bank's financial soundness and profitability in the short term as bank capital channel works, it could negatively affect the soundness of banks by encouraging banks to pursue risk in the long run as risk-taking channel works. It is necessary to note that the capital ratio according to the BIS minimum capital requirement of individual banks may cause an illusion in supervising the soundness of the bank. So, the bank's aggressive lending expansion may lead to an inherent weakness in the event of a crisis. Since the financial authority may have an illusion about the bank's financial soundness if the low interest rate persists, the authority needs to be actively interested in stress tests and concentration risk management in the pillar 2 of the BIS capital accord. In addition, since system risk may increase, it is necessary to conduct regular stress tests or preemptive monitoring of assets concentration risk.

• Journal of the Korea Convergence Society
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• v.7 no.3
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• pp.159-165
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• 2016

The purpose of this study is to investigate the change in the positive psychology movement of capital represented by the performance of physical disabilities to participate in swimming classes for 10 weeks. The study was conducted with 30 to 40-men group participation handicapped total of 21 patients (10 patients) and non-participation group (11 patients), the duration of the experiment was performed three times a week for 10 weeks, 50 minutes. Data processing is a dictionary, post-test data was calculated the mean and standard deviation, experimental design group two won repeated measures analysis of variance for (swimming participating groups, miserable Lady) and time (before and after) using the SPSS 21.0 statistical program It was performed (2-way [2] RM ANOVA), all the statistical significance level was set at .05. Study, classroom participation of the handicapped swimmer can see that has had a positive effect positive psychological capital.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.413-421
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• 2021

This study is a descriptive survey research for relationship between basic psychological needs, positive psychological capital and psychological burnout according to type of nursing organizational culture. The participants were 151 clinical nurses at 5 general hospital located in M city from May 2020 to June 2020 by questionnaire survey. For data analysis, SPSS/WIN 23.0 program was utilized including one-way ANOVA, independent t-test, Pearson correlation coefficients. This study showed a positive correlation for basic psychological needs, positive psychological capital in relationship-oriented culture and innovation-oriented culture. In addition, it showed a negative correlation for psychological burnout. This study confirmed positive correlationt between relationship-oriented culture, Innovation-oriented culture and positive psychology in nursing organization. Therefore, it is necessary to establish a system within a nursing organization and develop related programs that can promote relationship-oriented culture, innovation-oriented culture.

• International Area Studies Review
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• v.22 no.4
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• pp.19-35
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• 2018

This paper is to estimate the total factor productivity(TFP) in the Korean manufacturing and service industries during the period 1975:1-2016:4 using the stochastic frontier analysis model. In order to analyze the determinants for the total factor productivity the paper estimates the industry-specific determinant elasticities of TFP using the autoregressive distributed model. The industry-specific determinants, which reflect the industrial structure and properties include markup, the ratio of capital to labor(KL), and the ratio of foreign intermediate goods (FIG) to industrial output. The average value for total factor productivity growth was estimated to be 0.0199 in manufacturing and 0.0063 in the service industry. The markup and KL elasticities of TFP were estimated to be 2.481 and 0.651 in manufacturing respectively and -1.403 and 0.042 in the service industry respectively. The empirical results suggest that the industrial markup and the ratio of capital to labor have had decisive effects on the changes in the total factor productivity in the Korean manufacturing and service industries during the period 1975:1-2016:4.