• Journal of the Korean Geographical Society
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• v.40
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• pp.55-71
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• 1989

이 글에서는 다음의 내용을 다루었다. 1. 연구지역 및 방법 2. 소득승수효과의 공간적 특색 3. 공간경제정책과 승수효과

• Journal of the Korean Regional Science Association
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• v.35 no.4
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• pp.3-18
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• 2019

This study estimates the levels of the basic and nonbasic activities in five rural centers in Cheongwon County by using the direct survey method and indirect non-survey methods. The economic base multipliers obtained through direct survey method and indirect non-survey methods are compared to find out the advantages and disadvantages of the estimation methods. There are some limitations in applying non-survey methods for economic base estimation. It is found that, among three non-survey methods, multipliers obtained through minimum requirements method are better than other two methods in terms of the theoretical assumption. However, if we use direct survey data and in-commuter/out-commuter data, we can obtain more accurate multiplier estimates.

• Economic Analysis
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• v.27 no.3
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• pp.33-60
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• 2021

This study estimates the fiscal multiplier using Input-Output table panel data from year of 2010 to 2018. Considering the endogeneity of the government expenditure, this study uses the share of government expenditure by sector in the initial period as an instrument variable. The estimation from the panel fixed effect instrumental variables model shows that the estimate for the current period of government expenditure is 1.15~1.22 and the estimate for the cumulative multiplier is 1.23~1.32 depending on the method of controlling time trend. Since the general equilibrium effect absorbed by the time-fixed effect in the estimation equation, the estimated multiplier in this study may be different from the multiplier of the economy as a whole. The general equilibrium effect depends on the response of monetary policy, changes in tax policy, and interaction between sectors.

• Journal of Korea Water Resources Association
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• v.47 no.2
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• pp.95-106
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• 2014

This paper analyses the economic effects of the water industry on the Korean economy by using Social Accounting Matrix (SAM). The SAM is constructed based on the Input-Output table, National account and Family income and expenditure survey for Korea in 2009. Through the SAM multiplier analysis, I estimate the effects of water investment. As the results, this study has found the followings. i) output multiplier effects of water sector are 5.300~7.741, ii) value added multiplier effects of water sector are 0.685~1.158, iii) income multiplier effects of water sector are 0.511~0.984, iv) redistributed income multiplier effects of water sector are -0.096~0.247. The results indicate that a significant influence on the industrial production and the household income in Korea.

• 사회경제평론
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• v.31 no.2
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• pp.1-38
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• 2018

In this study we attempt to quantify the export multiplier to definitively show how exports have undergirded the Korean economy and doing so we will describe how the export multiplier effect has diminished since the global financial crisis in 2008. We also argue that a trend of disinclination in the marginal propensity to consume, one of the determinants of the multiplier, has played an important role in its contraction. In this new, alien economic environment, the kinds of policies that once buttressed the export-led growth strategy of the halcyon days require immediate revision. More policies should implemented that bolster domestic demand, especially consumption, rather than continuing efforts to facilitate supply side-based growth through export-friendly policies.

• Communications of Mathematical Education
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• v.37 no.1
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• pp.65-84
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• 2023

The method of Lagrange multipliers, one of the most fundamental algorithms for solving equality constrained optimization problems, has been widely used in basic mathematics for artificial intelligence (AI), linear algebra, optimization theory, and control theory. This method is an important tool that connects calculus and linear algebra. It is actively used in artificial intelligence algorithms including principal component analysis (PCA). Therefore, it is desired that instructors motivate students who first encounter this method in college calculus. In this paper, we provide an integrated perspective for instructors to teach the method of Lagrange multipliers effectively. First, we provide visualization materials and Python-based code, helping to understand the principle of this method. Second, we give a full explanation on the relation between Lagrange multiplier and eigenvalues of a matrix. Third, we give the proof of the first-order optimality condition, which is a fundamental of the method of Lagrange multipliers, and briefly introduce the generalized version of it in optimization. Finally, we give an example of PCA analysis on a real data. These materials can be utilized in class for teaching of the method of Lagrange multipliers.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1998.11a
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• pp.65-69
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• 1998

진화 연산을 이용하여 최적화 문제를 푸는데 있어서 가장 잘 알려져 있는 문제 중의 하나는 미완숙 수렴이다. 일반적인 제한 최적화 문제를 푸는 기법으로서 제안된 하이브리드 진화프로그래밍(EP), 이상 EP(TPEP), Evolian 등과 같은 알고리즘도 첫 번째 상에서 이와 같은 문제점을 내포하고 있다. 본 논문에서는 이같은 문제점을 극복하기 위해서 Evolian 알고리즘에 공유 함수 기법을 적용하고 다음 상들을 위해서는 다중 라그랑지안 승수를 사용하고자 한다. 부개체군 영역에서 각각의 라그랑지안 승수들을 설정하고 병렬적으로 갱신해 나가면서 전역적인 최적해를 병렬적으로 찾아나간다. 컴퓨터 모의 실험을 통해서 제안된 공유 기법 및 다중 라그랑지안 승수 기법의 유용성을 보인다.

• The Journal of the Korea Contents Association
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• v.16 no.3
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• pp.33-42
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• 2016

Utilization of cultural contents is more and more increasing as it is believed to improve local problems and provide historical values. This kind of business is positive in terms of the fact that it attracts visitors into local areas and activate local commercial areas. Under this trend, the construction of specialized streets is required to be approached with first priority to solve problems of cities. So to speak, it's more important to solve intrinsic problems found in local communities and then approach cultural contents step-by-step rather than constructing new spaces with first priority. Moreover, cultural contents should accompany economic aspects which result in local community-friendly and sympathetically concentrated values. Under this sentiment, the efforts to suggest economic ripple effects for government local government's businesses using cultural contents are very important. This study analyzed how much economic ripple effects is yielded by reflecting cultural contents. As the result of analysis, specialized street with cultural contents applied are proved to be more concentrated on multiplier of expediting employment, income and tax and tourism industry than service industry. On the contrary to this, service industry showed more concentrated multiplier of expediting production, income, added values and chain reaction effect (coefficients for influence and sensitivity for front and rear side of tourism industry. Based on these results, construction of specialized streets with cultural contents applied is proved to help synergy effects for local economy.

• 한국디지털정책학회:학술대회논문집
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• 2004.05a
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• pp.403-419
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• 2004

이글은 한국은행 산업분류 세분류 404 부문 중 정보통신부문에 해당하는 (1) 유선통신기기, (2) 무선통신 및 방송기기, (3) 컴퓨터 및 주변기기, (4) 통신시설, (5) 초고속망서비스, (6) 부가통신, (7) 소프트웨어 개발 공급, (8) 컴퓨터관련 서비스 분야를 중심으로 대기업과 중소기업의 고용창출 효과를 활동 상품 틀이라는 분석도구를 이용해 파악해 보는데 있다. 분석결과, 정보통신 분야별 산업활동에 대응하는 대기업의 고용승수는 컴퓨터 관련 서비스업 (0.0196), 소프트웨어 개발공급업 (0.0186), 유선통신기기업 (0.0152), 통신시설업 (0.0146), 컴퓨터 및 주변기기업 (0.0132) 등의 순으로 높게 나타났다. 그리고 정보통신 분야별 산업활동에 대응하는 중소기업의 고용승수는 통신시설업 (0.0165), 컴퓨터 빛 주변기기업 (0.0151), 유선 통신기기업 (0.0143), 컴퓨터관련서비스업 (0.0126) 등의 순으로 높게 나타났다. 이와 같이 분석된 정보 통신 분야별로 대기업과 중소기업의 고용창출효과는 현실적으로 직면해 있는 IT 분야의 고용창출 문제를 해결하는데 중요한 정보로 활용될 수 있을 것으로 판단된다.

• The Korean Journal of Applied Statistics
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• v.28 no.2
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• pp.189-200
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• 2015

Stationary bootstrapping is applied to a Lagrangian multiplier (LM) test to test market microstructure noise (MMN) in financial asset prices. A Monte-Carlo experiment shows that the bootstrapping method improves the size of the original LM test which has some size distortion for conditional heteroscedastic models. The proposed test is illustrated for real data sets like KOSPI index and Won-Dollar exchange rate.