• Bulletin of the Society of Naval Architects of Korea
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• v.38 no.4
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• pp.56-63
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• 2001

산업은 흔히 생명체처럼 일종의 라이프사이클을 따르는 것으로 여겨지고 있다. 이들은 태어나서, 젊고 활력 넘치는 성장기를 거쳐, 투자기, 발전기의 과정으로 나아가며 일정한 지점에 이르게 되면 성숙과 힘을 성취한다 이 지점에 서 기술개발속도는 떨어지며, 발전 중이거나 새로이 산업화한 경제 속에서 다음 세대가 탄생한다. 이 새로운 세대가 낮은 코스트를 기반으로 힘을 성취해가게 됨에 따라, 초창기의 생산 기반에 자리잡은 구세대의 활력과 경쟁력은 점차 약화된다. 그리하면 구세대는 결실을 맺고 지루한 종반전(end-game)인 쇠 퇴기에 접어든다. 이러한 탄생, 쇠퇴 그리고 훨씬 낮은 코스트를 기반으로 하는 경제로의 이 전이라는 라이프사이클은 일부 중공업에서는 쉽게 관찰되지만. 그밖의 다른 산업분야에서는 명확하지 않다. 조선업의 경우는 어떠한가. 선진 조선국의 조선 업이 성숙기에서 그 경쟁력 유지가 가능할 것인가, 아니면 이들 산업이 일련 의 보다 낮은 코스트 지대로 옮겨가는 것이 필연적인가. 이 글에서 필자들은 전술한 라이프사이클이라는 분석틀을 사용하여 이 같은 물음과 관련된 몇 가지 문제를 살펴보고자 한다

• Korean journal of communication and information
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• v.45
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• pp.7-48
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• 2009

The recent crises of Marxism do not mean Marx’s crisis. Marx said that he was not a Marxist. The purposes of this essay explore (1) the modern identity of the political economy; (2) the possibilities of mutual understanding between neoclassical economics and Marxist economics; (3) problems of the political economy in media and communication industry. I have begged for analytical Marxists, because of their good fruits. They accepted the methods of modern social science and they constituted a tremendous advance in the application of the scientific methods to the study of society. In insisting on micro-foundations(methodological individualism), analytical Marxism distinguished itself from structuralism and functionalism. I appreciate that analytical Marxism has reduced a theory to practice. But the works didn’t listen to everyone(from Marxists to un-Marxists), and explain everything. Making theory with production/consumption, macro/micro, and structure/behavior is a road to the political economy in the long run. It also applies to media and communication industry. The realm of media/communication is broad, which in philosophy, humanities, politics, economics, sociology, and engineering. And media policy is more complicated by politicians who look at the same situation from different angles. By the aid of interdisciplinary research, the political economy of media/communication shall explain at full length.

• Journal of the Korea Society of Computer and Information
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• v.27 no.11
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• pp.257-270
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• 2022

This paper analyzes the effect of profit incentives within the setting of bounty open source project. A simple decision-making model based on classical utility maximization is presented for open source developers that includes income effects from the bounty prize. We then simulate the decisions of multiple developers to assess the effect from the bounty prize. Our result shows that learning costs can greatly reduce the software quality improvement benefit from bounty project. It also suggests that open source projects can benefit more when they have multiple small bounty projects than a single large bounty project since it reduces the learning cost and the opportunity cost for the open source developers.

• KDI Journal of Economic Policy
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• v.16 no.3
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• pp.125-146
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• 1994

본(本) 논문(論文)에서는 1993년에 퇴직한 공무원(公務員)들에 대한 자료(資料)를 사용하여 이들의 시간할인율(時間割引率)을 측정하였다. 시간할인율(時間割引率)은 여러 경제학 모형에서 개인(個人)의 소비(消費)와 저축행태(貯蓄行態)를 결정짓는 중요한 요소로 등장한다. 시간할인율(時間割引率)을 추정한 기존의 실증분석(實證分析)들은 1% 내외의 매우 낮은 추정치(推定値)를 보고하고 있으며, 심지어 음(-)인 경우도 있다. 이러한 낮은 추정치는 시간할인율(時間割引率)이 실질적으로 거의 아무런 역할을 하지 않음을 의미한다. 그러나 기존의 실증분석(實證分析)은 대부분 거시(巨視) 시계열자료(時系列資料)를 사용하여 경제내의 대표적(代表的) 개인(個人)(representative individual)이라는 가상적 존재의 시간할인율(時間割引率)을 추정하였다는 단점을 갖는다. 본(本) 논문(論文)에서는 우리나라의 퇴직공무원들에 대한 미시(微視) 횡단면자료(橫斷面資料)를 사용하여 실존하는 각 개인(個人)의 시간할인율(時間割引率)을 추정하였고, 그 결과 기존의 연구(硏究)에서와는 달리 시간할인율(時間割引率)이 평균적으로 14~15% 정도의 매우 높은 값을 가짐을 발견하였다. 이러한 결과는 개인(個人)의 노후생활(老後生活) 안정(安定)을 위한 저축(貯蓄)을 각 개인(個人)의 자발적인 의사에 일임하기보다는 공적(公的), 사적연금제도(私的年金制度)를 통하여 강제하는 것이 합리적일 수 있음을 보여준다.

• Journal of Korea Society of Industrial Information Systems
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• v.28 no.6
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• pp.115-129
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• 2023

This study compares and analyzes domestic and international carbon prices through CPS, which represents the level of carbon pricing. The results show that countries implementing carbon taxes had lower carbon intensity compared to those that did not. The introduction of a carbon tax is expected to enhance energy efficiency and reduce carbon emissions. As the carbon price rises to the level required for carbon neutrality, CPS decreases significantly, particularly in the residential and commercial sectors. Therefore, it is necessary to introduce a carbon tax in the country to reach the required carbon price level for carbon neutrality, with a priority on introducing it in the residential and commercial sectors.

• International Commerce and Information Review
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• v.16 no.5
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• pp.343-359
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• 2014

This study investigates how cultural differences between countries affect bilateral trade volumes, using Hofstede's cultural index that reflects nations' cultural characteristics. Empirical analyses of the impacts of Hofstede's five cultural characteristics on bilateral trade volumes are conducted either in each separate equation or simultaneously. Bilateral trade data of OECD countries plus China as of year 2010 is used for regression analysis on gravity model. Regression results from individual equation for each cultural index variable show tthe smaller the index gaps of power distances and uncertainty avoidance among countries, the larger bilateral trade volumes. On the contrary, the larger the index gaps of long-term orientation among countries, the larger bilateral trade volumes. If five Hofstede cultural indexes are regressed in a single equation, however, only variables of power distance and long-term orientation are significant. The analysis largely confirms that bilateral trade among countries with similar culture have much potrential to grow. It implies that policy actions for cultural proximity are very important for furthering bilateral trade.

• Journal of KIISE:Computing Practices and Letters
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• v.12 no.5
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• pp.275-285
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• 2006

This paper proposes an efficient market mechanism-based resource transaction model for grid computing. This model predicts the next resource demand of users and suggests reasonable resource price for both of customers and resource providers. This model increases resource transactions between customers and resource providers and reduces the average of transaction response times from resource providers. For prediction accuracy improvement of resource demands and suggestion of reasonable resource price, this model introduces a statistics-based prediction model and a price decision model of microeconomics. For performance evaluating, this paper measures resource demand prediction accuracy rate of users, response time of resource transaction, the number of resource transactions, and resource utilization. With 87.45% of reliable prediction accuracy, this model works on the less 72.39% of response time than existing resource transaction models in a grid computing environment. The number of transactions and the resource utilization increase up to 162.56% and up to 230%, respectively.

• Economic Analysis
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• v.26 no.3
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• pp.48-70
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• 2020

Using data from the Household Income and Expenditure Survey over the period 1994-2016, we estimate the coefficient of relative prudence in order to capture precautionary saving motive. To do this, we adopt a cohort approach, where we transform such microdata into sample cohort means. Together with initial income involving liquidity constraint, we estimate the relative prudence derived from the Euler equation. The two-stage least-squares (2SLS) between estimate of it obtained from the cohort panel data analysis is too small for the existence of precautionary saving motive, as in previous studies, while the 2SLS random effects estimate is so reasonable. Moreover, the liquidity-constrained cohorts tend to be more sensitive to uncertainty, relative to the unconstrained ones.

• Korea journal of population studies
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• v.19 no.2
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• pp.107-137
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• 1996

Under-utilization of Korean women's education in the labor market has been observed and pointed out as a waste of valuable human resources. Although education provides women with positive returns when they work, it has been found that Korean women's education is not much related to the likelihood of women's labor force participation. This tendency cannot be explained by micro-economic theory, which says that educated women are more likely to participate in the labor force. Thus, in this analysis, a macro-level explanation is attempted to understand Korean women's economic behaviors in relation to education. Korea's rapid industrialization since 1960 has provided ample job opportunities mostly for less educated women. On the other hand, increasing demand for educated female labor has been moderate. Various restriction against women, especially married women, have prevailed in the Korean labor market. Restrictions against women and the marriage bar tend to be selectively applied to decent white-collar jobs, mostly affecting educated women. Furthermore, there has been no shortage of educated male labor due to its adequate supply. Since Korean women spend most of their adult lives in marriage, married women's low participation in the labor force is a critical factor for the low economic returns to women's education throughout their lifetime. Restriction against married women in the labor market also existed in the past of the United States and the Great Britain. However, along with the expansion of the service sector, married women in great numbers flowed into non-manual jobs. The post-1940 increase of married women in the labor force in those countries can be understood to be a result of a labor shortage for non-manual jobs. Also in Taiwan, which shares many common cultural and economic backgrounds with Korea, the marriage bar has been in decline since the late 1970s, along with an increasing demand for female labor in the service sector. In sum, the changes in the demand structure and the supply of educated male labor force will contribute to the lift of the marrige bar in Korea.