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- 저자 : 조장희(JangHee Cho) (검색결과 13 건)
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지역 경제의 생산성 성장에 대한 진입과 퇴출의 영향 : 제주도의 소매업을 중심으로
조장희 ( Janghee Cho ) 서강대학교 지암남덕우경제연구원 2017 시장경제연구 Vol.46 No.2
This paper sheds new light on the relationship between entry-exit and labor productivity growth of the retail sector in Jeju. From 2005 to 2010, the positive shift of demand, resulting from a rise in the population and number of tourists, had a positive impact on labor productivity by 20%. The decomposition shows two contrasting results; (1) a rise in incumbents` efficiency explains 65% of the total productivity growth, (2) the entry-exit, however, accounts for 84% productivity growth in each local economy. Using full information MLE, this paper analyzes the relationship between entry-exit and incumbents` productivity growth. The results show that the higher entry rates lead to lower survival rates, but increase survivors` labor productivity rapidly.
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한국 소매업의 생산성 성장 : 사업체 진입과 퇴출의 역할을 중심으로
조장희 ( Janghee Cho ),신동한 ( Donghan Shin ),전현배 ( Hyunbae Chun ),김진영(논평),이창근(논평) 한국금융연구원 2020 한국경제의 분석 Vol.26 No.3
While productivity growth in the manufacturing sector is mainly accounted for by technological advances of incumbent establishments, resource reallocation through both the entry of efficient establishments and the exit of inefficient ones plays a crucial role in productivity growth in the service sector. However, the high rates of entry and exit in Korean retail industry have been regarded as rather a sign of excessive competition. A main underlying reason for this view is that Korean retail industry has a relatively large share of small and less-productive establishments compared to the United States and other developed countries. This paper examines whether the frequent entry and exit of small establishments could lead to the process of creative destruction and thus productivity growth in Korean retail industry. Using establishment-level Census data and the method of Foster et al. (2006), we decompose the aggregate retail productivity growth from 2005 to 2015 into contributions of continuing, entering, and exiting establishments. We find that both the entry and exit contribute to approximately 85% of productivity growth in the retail industry. The estimate is larger than that in Canada and Japan but smaller than that in the United States. Overall, the finding indicates that both entry and exit play crucial roles in the productivity growth of Korean retail industry. Using regression analyses, we also investigate the heterogeneous productivity effects of entry and exit by establishment size as well as by subsector. Evidence on creative destruction through entry and exit is found in both the general merchandise sector (GMS) and non-GMS one. However, creative destruction is evident only for groups of small GMS establishments and medium-sized non-GMS establishments. Furthermore, both small and medium-sized establishments experience productivity growth after their entry while large ones do not. Our findings confirm that creative destruction through entry and exit contributes to productivity growth even in the sector that is mostly composed of small establishments. Furthermore, our paper provides crucial evidence for debates on entry-deterring policies aimed to ease excessive competition among small businesses.
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조장희(Janghee Cho),강기수(Kisoo Kang) 제주대학교 관광과경영경제연구소 2018 産經論集 Vol.38 No.1
Purpose - This study examines the factors of exit from convenience stores in Jeju Island and examines whether the market selection process in which more inefficient companies are excluded from the market in order to improve market efficiency. And through some test for the market selection, we identify the key mechanism for the market growth. Research design, data, and methodology - The purpose of this study is to analyze the factor of the exit of convenience stores in Jeju by using the data of ‘Census on Establishments’ and ‘Economic Census’ of Korea National Statistical Office. And we matched two data through own business number. In the present study, whether the convenience store is withdrawn as a dependent variable is a variable having only values of 0 and 1, and is analyzed using a probit model. The explanatory variables in this study include labor productivity, the number of employees, the age of the business, and the background population. In this paper, labor productivity is a key variable to measure efficiency of firm and informs the selection criteria of local market. Results - The main result of this study is that, when considering only the convenience store market, the exit of convenience store according to market efficiency is relatively weak compared to the effect of overall retail store, but some short term results are statistically significant. In the subsample analysis using Jeju-si and Seogwipo-si, the market selection effect through the labor productivity is stronger in Seogwipo-si than Jeju-si. Conclusions - The market selection effect of efficiency reallocation in the convenience store market did not appear to be significant. The reason is largely as follows: First, Jeju is not yet mature enough to show competition in the convenience store market, and it means that Jeju is a still growing market. Second, since convenience stores are relatively competitive with other retail stores and local markets, the format competition between convenience stores and other retail stores may be more intense than competition in the convenience store market. Finally, there is a possibility that the reasons for exclusion due to the CEO, age, etc., which are not considered in this study, may be different from each other.
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조장희(Janghee Cho),허정(Jung Hur) 한국경제연구학회 2013 한국경제연구 Vol.31 No.4
본 연구는 2006년부터 2010년까지 통계청에서 조사된 상용근로자수 50인 이상 자본금 3억 이상의 기업 전수를 조사대상으로 한, ‘기업활동조사’ 자료를 이용하여 국내 제조업 기업의 오프쇼어링 결정요인과 기업의 총요소생산성과의 관계에 대한 실증분석을 수행하였다. 연구결과 총요소생산성이 높을수록 오프쇼어링을 수행할 확률이 높게 나타났으며, 이는 종업원수 및 자본집약도 등의 기업특성변수와 연도, 본사의 위치 등을 통제한 후에도 유지되었다. 또한 수출에 관한 의존도가 높은 기업의 특성을 고려하여, 기업의 수출 여부에 따라 오프쇼어링 수행확률이 어떻게 달라지는지를 관찰하였다. 그 결과 기업의 수출 여부와 관계없이 생산성이 높은 기업 일수록 오프쇼어링의 수행확률은 여전히 높게 나타나는 것을 볼 수 있었으며, 통계적 유의성 또한 유지되었다. This study examines a relationship between total factor productivity and foreign offshoring decision of Korean firms in manufacturing sectors, utilizing the official government database of Survey of Business Structure and Activities(SBSA) collected by Statistics Korea from 2006to 2010. Our empirical result shows that the probability of conducting offshoring increases as productivity is higher. This result is robust after controlling the numbers of employed workers, capital-labor intensity, years and the location of firms. We further examine the probability of offshoring choice for exporting firms. The result shows that the offshoring decision is still significantly related to the firm"s productivity itself.
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압력선회형 인젝터를 이용한 모사 젤 추진제의 분열특성에 관한 연구
조장희(Janghee Cho),이동희(Donghee Lee),이동근(Donggeun Lee),강태곤(Taegon Kang),문희장(Heejang Moon) 한국추진공학회 2021 한국추진공학회 학술대회논문집 Vol.2021 No.5
본 연구에서는 압력 선회형 인젝터를 이용한 모사 젤 추진제의 분무실험을 수행하여 젤화제 첨가량에 따른 분무특성을 파악하였다. 실험을 통해 인젝터 내부의 공기층이 노즐에 국부적으로 형성되며 점차 와류실까지 확장되는 것을 확인하였으며 뉴턴 유체의 공기층 발달과정과 형상학적으로 유사한 경향성을 보였다. 분무형상은 4개의 유형으로 구분하였으며, 이를 공기층의 형성과정과 연관하여 형상학적으로 분석하였다. 분무형상을 바탕으로 일반화된 레이놀즈수, 웨버수 및 오네소지수와 같은 무차원 수에 따라 분열영역을 구분하였다. 추후 분무성능에 영향을 미치는 와류실 형상변화에 따른 공기층의 형상과 안정성, 이에 따른 분무특성에 관한 연구가 추가로 필요할 것으로 사료된다. In this study, cold-flow test of simulant gel is conducted using a pressure swirl injector to identify spray characteristics according to gellant weight percent. Experiment results show the aircore being developed locally at the nozzle and expanded to the entire swirl chamber as the supply pressure increases. The aircore formation of simulant gel show no significant difference compared to Newtonian fluid. The spray pattern was classified into four distinct shapes and relationship between the breakup regimes and dimensionless numbers were investigated. In the future, additional study is required to understand the aircore formation, stability and spray characteristics at different configuration of the swirl chamber shape.
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조장희(Janghee CHO), 안진현(Jinhyun AHN), 손녕선(Nyeong Seon SON) 제주대학교 관광과경영경제연구소 2021 산경논집 Vol.41 No.1
Purpose: The 4th Industrial Revolution changes the paradigm of living and creates technological and economic difference between regions. This is a job that in perspective, the long-term regional imbalance of employments covered technology of AI, Big-data, and others, leads to an imbalance of regional growth. Research design, data and methodology: This study examines the number of jobs related to the 4th Industrial Revolution between regions through online job posting data. Job data are collected through the API of the Saramin website, and we compare the proportion of skilled jobs among 17 provinces. Results: Among the jobs in AI, big-data, robotics, and etc, the proportion of finding AI experts is the highest. These jobs are mainly concentrated in the metropolitan areas such as Seoul and Gyeonggi, and are located in Busan, Daegu and Daejeon, for robotics and some skills. In particular, skilled jobs are concentrated in districts with many IT companies, such as Gangnam and Seocho in Seoul and Bundang in Gyeonggi. Conclusions: The imbalance between urban and non-urban jobs related to the 4th Industrial Revolution can create a skill gap and widen the economic gap between regions. Therefore, policies for the 4th industrial revolution in non-urban areas are needed.
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