• Title/Summary/Keyword: 동태적변화

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The Impact of Dual Labor Markets on Labor Productivity: Evidence from the OECD (노동시장 이중구조가 노동생산성에 미치는 영향: OECD 국가를 중심으로)

  • Choi, Koangsung;Lee, Jieun;Choe, Chung
    • Economic Analysis
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    • v.25 no.3
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    • pp.1-29
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    • 2019
  • This paper examines the impact of a dual labor market structure on labor productivity using unbalanced panel data from 29 OECD member countries between 1990 and 2015. By applying a variety of regression models on the panel data (e.g., a pooled regression, a fixed effects model and a GMM), we explore how changes in worker-type composition among temporary, permanent and self-employed workers contribute to productivity growth. While it appears that our results differ slightly, depending on the econometric models, overall an increase in the share of permanent workers leads to a relatively higher increase in productivity growth. On the other hand, it is also seen that the effects of the share of temporary workers on labor productivity are considerably lower than that of permanent and self-employed workers. To sum it up, our findings indicate that an increase in temporary workers could have an adverse effect on labor productivity.

An Analysis of the Dynamics between Media Coverage and Stock Market on Digital New Deal Policy: Focusing on Companies Related to the Fourth Industrial Revolution (디지털 뉴딜 정책에 대한 언론 보도량과 주식 시장의 동태적 관계 분석: 4차산업혁명 관련 기업을 중심으로)

  • Sohn, Kwonsang;Kwon, Ohbyung
    • The Journal of Society for e-Business Studies
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    • v.26 no.3
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    • pp.33-53
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    • 2021
  • In the crossroads of social change caused by the spread of the Fourth Industrial Revolution and the prolonged COVID-19, the Korean government announced the Digital New Deal policy on July 14, 2020. The Digital New Deal policy's primary goal is to create new businesses by accelerating digital transformation in the public sector and industries around data, networks, and artificial intelligence technologies. However, in a rapidly changing social environment, information asymmetry of the future benefits of technology can cause differences in the public's ability to analyze the direction and effectiveness of policies, resulting in uncertainty about the practical effects of policies. On the other hand, the media leads the formation of discourse through communicators' role to disseminate government policies to the public and provides knowledge about specific issues through the news. In other words, as the media coverage of a particular policy increases, the issue concentration increases, which also affects public decision-making. Therefore, the purpose of this study is to verify the dynamic relationship between the media coverage and the stock market on the Korean government's digital New Deal policy using Granger causality, impulse response functions, and variance decomposition analysis. To this end, the daily stock turnover ratio, daily price-earnings ratio, and EWMA volatility of digital technology-based companies related to the digital new deal policy among KOSDAQ listed companies were set as variables. As a result, keyword search volume, daily stock turnover ratio, EWMA volatility have a bi-directional Granger causal relationship with media coverage. And an increase in media coverage has a high impact on keyword search volume on digital new deal policies. Also, the impulse response analysis on media coverage showed a sharp drop in EWMA volatility. The influence gradually increased over time and played a role in mitigating stock market volatility. Based on this study's findings, the amount of media coverage of digital new deals policy has a significant dynamic relationship with the stock market.

The Role of stock market management and social media - Analyzing the types of individual investor and topic - (주식시장관리제도와 소셜 미디어의 역할 - 개인 투자자 집단 유형과 토픽 분석 -)

  • Kim, Jung-Su;Lee, Suk-Jun
    • Management & Information Systems Review
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    • v.34 no.5
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    • pp.23-47
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    • 2015
  • In the Korea stock market, individual investors have perceived stock as short arbitrage investment, not long-term investment strategy. In order to reinforce stock market transparency and soundness, it is important to enforce the measures for stock market management. Especially, stock market event caused by financial policy can be given individual investors negative information regarding a stock trading. Thus, it is a need for investigating whether comprehensive review of listing eligibility is influenced on individual investors' responses and stock behaviors in respect of effectiveness. The purpose of this study to examine the relations between such stock market management and transitional aspect of individual investors' trading types and response on the based of pre- and post-event occurrence. Using an dataset of user's text messages on 9 firms posted on the firm-based social media (i.e., Naver, Daum, Paxnet) over the period 2009 to 2014. And we performed text-clustering and topic modeling according to keywords for classifying into investors group and non-investors groups and two types of investors were categorized depending on main topic transition by event windows in Comprehensive review of listing eligibility. The results indicated that a variety of stockholders existed in the stock. And the ratio of non-investors group was on the decrease, on the other hand, the proportion of investors group veer onto the side of pre-pattern after comprehensive review of listing eligibility. A distinctive feature of our study is to explain the influence of stock market management on response changes of individual investors as well as to categorize in accordance with time progression. Implications an suggestions for future research were also discussed.

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이동전화 서비스 사업자의 기술혁신에 대한 동태적 분석

  • 류희숙;나광국;배종태
    • Proceedings of the Technology Innovation Conference
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    • 2004.06a
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    • pp.3-26
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    • 2004
  • 현재 우리나라는 제조업 중심 사회에서 서비스 중심 사회로 경제구조가 변화해 가고 있다. 이에 따라 기업 성장의 원동력으로서의 기술혁신의 역할을 서비스 산업에도 적용하는 연구가 시작되고 있다. 그간 제조업에서의 기술혁신에 대한 연구는 많이 있었으나, 서비스 산업의 기술혁신에 대해서는 연구가 부족했다. 특히 서비스 산업의 개별 섹터를 심층적으로 분석한 연구도 역시 부족한 상황이다. 본 연구에서는 한국의 이동전화 서비스 산업을 중심으로 서비스 산업에서 나타나는 기술혁신의 동태성을 살펴 보았다. 기존 이동전화 서비스 산업을 다룬 연구에서는 주로 국가별 비교로서 규제나 법개정에 의한 파급효과를 관찰하는 정치적인 목적이 강했으며, 서비스 산업 관점에서 제조업의 제품혁신에 해당하는 신규 서비스 개발, 제조업의 공정혁신에 해당하는 운용기술개선의 변화를 기술혁신의 관점에서는 연구하지 않았다. 본 연구에서는 서비스 혁신을 이동전화 서비스 산업에서의 대규모 표준화된 통신 네트워크에서 고객의 요청에 의해 즉시 생산되는 무형의 산물로서 서비스 사업자의 기술개발에 의해 창출된 것으로 정의하였다. 구체적으로 고객이 제공받는 서비스 그 자체의 변화로서 새로운 기능이 추가되는 경우를 서비스 제품 혁신(Service product innovation), 고객에게 서비스를 제공하는 과정의 변화나 기능을 효율적으로 제공하는 것을 서비스 과정 혁신(Service process innovation)으로 정의하였으며 이의 변화를 통해 이동전화 서비스 산업의 기술혁신패턴 파악 및 서비스의 수명주기에 따른 혁신의 세부 형태를 살펴보고 기술혁신의 동태성을 파악하였다. 연구의 결과, 이동전화 서비스 산업에서는 기존의 제조업에서 나타나는 선 제품혁신, 후 공정혁신의 혁신패턴과는 반대로, 공정혁신이 먼저 발생한 후, 제품혁신이 나타나는 동태성을 보여주었다. 또 서비스의 수명주기에 따라 세부적인 혁신의 형태가 달라지는 모습을 확인 할 수 있었다.a}E$)는 동결건조 0.5%가 control사이에서 0.95로 가장 색차가 크게 나타났으며, 그 다음이 냉동분쇄 0.5% 0.83으로 나타나 송이의 첨가율이 높을수록 색차가 크게 나타나는 것을 알 수 있다. 색차가 가장 낮은 제품은 법동분쇄 0.3%, 동결건조 0.3%로 나타났다. 송이양갱의 색(color), 냄새(flavor), 맛(taste), 외관(appearances), 질감(viscosity), 종합적 평가(overall acceptability) 등의 관능평가를 실시한 결과 중 색에 대한 기호도는 냉동분쇄 0.1% 송이양갱이 가장 높은 것으로 나타났으나, 집단간 유의한 차이는 나타나지 않았고, 냄새는 동결건조 0.1%의 송이양갱이 3.38로 가장 점수가 높았으며, 냉동분쇄 0.3%의 송이양갱이 2.81로 가장 낮은 기호도를 나타내었다. 맛에서는 p<0.01수준에서 집단간 유의한 차이를 나타내었는데, 동결건조 0.1%가 그 중 가장 높은 기호도를 나타내었으며, 그 다음이 동결건조 0.5%였다. 가장 낮은 선호도를 나타낸 것은 열풍건조 0.5%였다. 질감은 P<.05 수준에서 집단간 유의미한 차이를 나타내었으며 동결건조 0.1%가 가장 높은 기호도를 나타내었으며, 동결건조 0.5%함유 송이양갱이 1.21로서, 현저히 낮은 기호도를 나타내었다. 종합적인 평가에서는 동결건조 0.1%함유 송이양갱이 가장 높은 기호도를 나타내었고 열풍건조 0.5% 함유 송이양갱이 가장 낮은 기호도를 나타내었다. 이상의 연구결과에서 각기 다른 전처리를 한 송이의 첨가량에 따른 송이양갱의 이화학적 특성에서는 큰 차이가 없었으나, 동결 건조한 송이를 0.15% 첨가한 송이양갱이 관능적 기호도 특성에서 가장 적당한 것으로 평가되어 실용화에는 동결건조 처리한 송이버섯을 0.1% 첨가하여 송이양갱을 제조하는 것이 가장 좋은 것으로 권장된다.ula showed a good agreement with the experimen

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Practical Strategies for Urban Regeneration through an Application of Landscape Urbanism (랜드스케이프 어바니즘 관점에서 본 도시재생 전략 연구)

  • Cho, Se-Hwan
    • Journal of the Korean Institute of Landscape Architecture
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    • v.38 no.2
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    • pp.109-118
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    • 2010
  • This study aims to propose practical strategies for the new urban ideal of regeneration. A book review highlights the emergence of new trends of urbanization in knowledge-information industrial society beyond the new town Ideal of the industrial society. The meaning of ‘landscape’ in landscape urbanism represents not the visual and decorative pictures, but the dynamic process in the context of changes and evolutions. Also, knowledge-information industrial society and landscape have a meaning in the same context of flow and process with changes of velocity. Finally, these key words convey a meaning with the new urban trends of urbanization in knowledge-information industrial society in the context of value-oriented characteristics of dynamics and process. Urban regeneration is emerging as the new urban ideal in the knowledge-information industrial society, beyond the new town ideal of industrial society. It is in the same context as landscape urbanism with respect to green infrastructure buildings and designs for the transformation of urban surfaces covered with concrete and asphalt into the ecological surface, and of the ecological surfaces into the cultural surface that could be communicated with human beings. This research revealed the six strategies for urban regeneration as follows. The First, the strategies for the transformation of urban surfaces into ecological surfaces, the second, the strategies for the transformation of ecological surfaces into cultural surfaces, the third, the introduction of mixed and convergence land use, the forth, the transformation of former sites(e.g. military and factory) into urban parks, the fifth, the introduction of waterfront park zones that have the function of ecological and park-oriented mixed land use and, the sixth, the building and design of green infrastructure in the residential and commercial complex in CBD. These strategies call for the reforms of development laws and regulations to restrict building coverage ratio, building heights, and the introduction of park-oriented mixed zoning regulations. Another method for implementating the above listed strategies was the introduction of a strategic planning system instead of the traditional master plan system. This system uses a value planning approach and brand making by imagery. It is able to construct the meaning of an image and its creativeness directly.

Analysis on Inundation Impacts of Sea Level Rise Using System Dynamics-GIS Model (System Dynamics-GIS 모델을 이용한 해수면 상승 침수 영향 분석)

  • KIM, Ji-Sook;KIM, Ho-Yong;LEE, Sung-Ho
    • Journal of the Korean Association of Geographic Information Studies
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    • v.18 no.2
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    • pp.92-104
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    • 2015
  • In order to analyze the impacts of climate change, a time and space integrated model was developed in this study using system dynamics and GIS. The model built was used to carry out a simulation on the inundation impact on A-gu of Busan Metropolitan city resulting from the sea level rise scenario of IPCC and storm surge, which is the worst case. Through this, the flooded area and population until 2100 were predicted. Also, the result and significance of each alternative was reviewed improving the model by establishing alternative scenarios of protection, accommodation and retreat as plans of reaction to sea level rise. The combination of system dynamics and GIS has advantages of how the diverse variables change until the target year can be traced and, accordingly, not only the results but also the processes of spatial change can be examined by calculating the value of change process at each time step. The synergy of this model presumed to be a foothold for solving problems which are becoming difficult to predict due to increase in uncertainty and complexity such as the support for decision making for urban resilience to natural disasters.

Variation of Determinant Factor for Seoul Metropolitan Area's Housing and Rent Price in Korea (수도권 주택가격 결정요인 변화 연구)

  • Lee, Kyung-Ae;Park, Sang-Hak;Kim, Yong-Soon
    • Land and Housing Review
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    • v.4 no.1
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    • pp.43-54
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    • 2013
  • This This paper investigates the variation of the factors to determinate housing price in Seoul metropolitan area after sub-prime financial crisis, in Korea, using a VAR model. The model includes housing price and housing rent (Jeonse) in Seoul metropolitan area from 1999 to 2011, and uses interest rate, real GDP, KOSPI, Producer Price Index and practices to impulse response and variance decomposition analysis to grasp the dynamic relation between a variable of macro economy and and a variable of housing price. Data is classified to 2 groups before and after the 3rd quater of 2008, when sub-prime crisis occurred; one is from the 1st quater of 1999 to the 3rd quater of 2008, and the other is from the 2nd quater of 1999 and the 4th quater of 2011. As a result, comparing before and after sub-prime crisis, housing price is more influenced by its own variation or Jeonse price's variation instead of interest rate and KOSPI. Both before and after sub-prime financial crisis, Jeonse price is also influenced by its own variation and housing price. While after sub-prime financial crisis, influences of Producer Price Index, KOSPI and interest rate were weakened, influence of real GDP is expanded. As housing price and housing rent are more influenced by real economy factors such as GDP, its own variation than before sub-prime financial crisis, the recent trend that the house prices is declined is difficult to be converted, considering domestic economic recession and uncertainty, continued by Europe financial crisis. In the future to activate the housing business, it ia necessary to promote purchasing power rather than relaxation of financial and supply regulation.

A Study on the Effect of Changes in Oil Price on Dry Bulk Freight Rates and Intercorrelations between Dry Bulk Freight Rates (국제유가의 변화가 건화물선 운임에 미치는 영향과 건화물선 운임간의 상관관계에 관한 연구)

  • Chung, Sang-Kuck;Kim, Seong-Ki
    • Journal of Korea Port Economic Association
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    • v.27 no.2
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    • pp.217-240
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    • 2011
  • In this study, vector autoregressive and vector error correction models in the short-run dynamics are considered to analyze the effect of the changes in international crude oil prices on Baltic dry index, Baltic Capesize index and Baltic Panamax index, and the intercorrelations between Capesize and Panamax prices, respectively. First, using the vector autoregressive model, the changes in international crude oil price have a statistically significant positive effect for Capesize at lag 1, for Panamax a significant negative effect at lag 3 and a significant positive effect for Baltic dry index at lag 1. From the impulse response analysis, the international crude oil price causes Baltic dry index to increase in the sort-run and the effect converges on the mean after 3 months. Second, using the vector error correction model, the empirical results for the spillover effects between Capesize and Panamax markets provide that in the case of the deviation from a long-run equilibrium the Panamax price is adjusted toward decreasing. The increases in freight rates of the Capesize market at lag 1 lead to increase the freight rates in Panamax market at present. The Panamax responses from the Capesize shocks increase rapidly for 3 months and the effect converges on the mean after 5 months. The Capesize responses from the Panamax shocks are relatively small, and increase weakly for 3 months and the effect disappears thereafter.

Aging and Poverty -Focusing on Age Group Differences in Poverty Trajectories- (노인되기와 빈곤 -빈곤 궤적의 연령집단 차이를 중심으로)

  • Lee, Ji-In;Joo, Eun-Sun
    • Journal of the Korea Convergence Society
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    • v.11 no.5
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    • pp.261-273
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    • 2020
  • The purpose of this study is to examine the trajectories of multi-dimensional poverty in the process of transitioning from middle age to old age, and to identify the factors that influence them. Using the Korea Welfare Panel Data(2006 ~ 2018), we examined the trajectory of changes in multi-dimensional poverty for 13 years by prospective elderly and middle aged group aged 55 or older in 2006 through the potential growth model. Multidimensional poverty is divided into seven dimensions in four areas: economy (income, employment), environment (residential), health, social culture (leisure, family relations, and social relations). The results showed that the level of multi-dimensional poverty decreased with time, and the overall poverty level was higher than that of the pre-old and the average. As a result of analyzing the condition model with the independent variable, the variables affecting poverty change were found in the order of spouse free and educational level for the elderly and gender and education level for the elderly. In other words, multi-dimensional poverty is gradually improving, but the rate of change and the variables that affect each age group are different.

한국노동시장(韓國勞動市場)의 동태적(動態的) 구조분석(構造分析)

  • Jang, Hyeon-Jun
    • KDI Journal of Economic Policy
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    • v.9 no.1
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    • pp.27-42
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    • 1987
  • 본논문(本論文)에서는 우리나라의 노동시장(勞動市場)의 구조(構造)를 동학적(動學的)으로 살펴보고 이에 따른 정책과제(政策課題)를 도출(導出)하기 위해 취업(就業)과 실업상태(失業狀態)를 번갈아 움직이는 노동자(勞動者) 행태(行態)의 결정요인(決定要因)을 실증분석(實證分析)하였다. 분석방법(分析方法)으로는 직업탐색이론(職業探索理論)을 이용(利用)하여 이론적(理論的)인 가설(假說)을 도출(導出)하였고, 계량적(計量的) 검증(檢證)을 위해 회귀모형(回歸模型)을 정형화(定型化)하였다. 통계자료(統計資料)는 1985년(年) 한해 동안의 "경제활동인구조사(經濟活動人口調査)"의 매월(每月) "테이프"에서 같은 근로자(勤勞者)를 11개월(個月) 동안 추적하여 분석(分析)을 위한 표본(標本)으로 이용(利用)하였다. 임금(賃金)은 취업(就業)에서 실업(失業)으로 변화(變化)할 확률(確率)에 대해 부(負)의 효과(效果)를 보이고 실업(失業)에서 벗어나 재취업(再就業)할 확률(確率)에도 부(負)의 효과(效果)를 나타내어 이론(理論)에서 도출(導出)된 가설(假設)이 검증(檢證)되었다. 연령(年齡)이 상태간(狀態間) 이동(移動)에 미친 효과(效果)는 부(負)의 값을 보였다. 그러나 이 효과(效果)는 일정한 연령(年齡)이 지나면 정(正)의 효과(效果)로 바뀌는 비선형성(非線型性)을 보였다. 이러한 결과(結果)에 입각(立脚)하여 우리는 높은 임금(賃金)을 받는 근로자(勤勞者)일수록 이직(移職)의 가능성(可能性)이 낮고 또한 실업상태(失業狀態)에서 재취직(再就職)의 가능성(可能性)이 낮다는 사실(事實) 등을 알 수 있다. 이에 따른 정책적(政策的) 시사점(示唆點)의 하나는 직업훈련(職業訓鍊)을 단순히 양적(量的)으로 확대(擴大)하기보다는 연령체계(年齡體系)에 맞추어 그 내용을 질적(質的)으로 조정(調整)하는 것이 바람직하다는 것이다.

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