한국 기업의 글로벌화를 위한 전략적 제휴와 혁신의 R&D 기업 생산성 검증

조정환(Jung-Hwan Cho),김태황(Tae-Hwang Kim) 한국무역연구원 2021 무역연구 Vol.17 No.5

Purpose - This paper aims to test the differences in the productivity of Korean companies according to whether they pursue strategic alliances as an open innovation strategy and implement R&D investment. Design/Methodology/Approach - We estimated labor productivity and total factor productivity using data from 2006 to 2018 from the Corporate Activity Survey of Statistics Korea. We tested the difference in productivity by utilizing the Kolmogorov-Smirnov test as non-parametric test method. Findings - As result of the test, firstly the productivity of companies that promoted strategic alliance was higher on average. Secondly, the productivity of Korean companies with experience implementing R&D investment with strategic alliances was higher on average than those of firms without experience in implementing strategic alliances and R&D. In addition, companies that invested in R&D intensively along with strategic alliances had higher productivity on average than companies that did not. Research Implications - These results suggest that a company s R&D performance along with a strategic alliance acts as means to increase productivity by producing and accumulating knowledge inside the company and absorbing external knowledge. In this regard, policy efforts are needed to reduce uncertainty in external environmental changes as well as at a global level, and to promote diverse cooperation for global strategies and the R&D investment of Korean companies.

속용성 정제간의 용출유사성에 대한 통계학적 고찰

조정환(Jung Hwan Cho),이세희(Se Hee Lee),김희선(Hee Sun Kim),오승열(Seung Youl Oh) 한국약제학회 2000 Journal of Pharmaceutical Investigation Vol.30 No.2

We have studied the dissolution kinetics of two fast releasing tablets in four media, and the similarity of dissolution profiles was compared using 3 methods. Two of the methods were introduced from statistical algorithm of distance methods, which are maximum distance and Mahalanobis distance. The dissolution kinetics were also analysed using FDA method for similarity evaluation, and the results were compared with those obtained using the distance methods.

New Paradigms of Sport & physical Education in the 21st Century PROCEEDINGS 1 / 9 . Measurement & Evaluation in P. E. ( Nancho Rm. ) : 여자대학생 건강체력 평가 기준 및 인터넷 자료 개발

조정환(Jung Hwan Cho),남은경(Eun Gyung Nam) 한국체육학회 2000 The 2000 Seoul International Sport Science Congres Vol.- No.-

증거기반(evidence-based) 체육정책, 프로그램의 개발과 평가

조정환(Jung Hwan Cho) 한국체육측정평가학회 2013 한국체육측정평가학회지 Vol.15 No.3

스포츠 체육분야에서 국가나 학교단위 정책이나 실천 프로그램이 투입되고 있지만, 정책과 프로그램들이 제 기능을 다하지 못할 때 경제적 교육적 경우에 따라서 사회적인 문제를 초래할 수 도 있다. 우리는 그동안 체육교육 신체 활동 증진을 목적으로 한 다양한 프로그램과 정책들이 성과 없이 실패로 그치는 사례를 직간접적으로 경험해 오고 있다. 이러한 배경에서 프로그램 개입이나 정책을 결정하는 단계에서 객관적인 근거정보 자료(data-driven policy making)들을 찾는 노력을 강조하고 있다. 증거에 기반한 정책 또는 실천(evidence-based policy, practice)모형은 실질적인 정책 및 프로그램 개입의 효과를 평가할 수 있는 방법론으로 의료분야를 시작으로 다양한 학문영역에서 활용하고 있다. 이 글에서는 의료보건, 교육, 사회, 행정 등의 영역에서 이해 실천되고 있는 증거기반 연구방법의 개념과 방법론 그리고 각 분야에서의 실천 경향을 소개함으로서 체육 스포츠 분야의 정책 및 프로그램 개발 및 효과성 평가에 활용할 수 있는 기반을 제공하려는데 목적이 있다. 구체적으로 이 글에서는 체계적 증거기반 수립 모형의 소개와 진실험(true experimental research), 준 또는 유사실험(quasi-experimental) 상황에서 증거기반의 자료로 활용할 수 있는 계량적 방법론으로서 Rubin의 인과모형, 경향점수(propensity score) 적용 방법 등을 제시하였다. In the past, various policies or action plans related to the sport, physical education, and physical activity promotion have been applied in the national or school district levels. These policies or action plans, however, turned out no effect or failed often. To overcome the failures, ‘data-driven policy making’ can be employed and emphasized at the decision making level based on successful implementations of evidence-based policy and practice models in the medicine fields. In this article, it includes not only academic values, research methods, and effective interventions, but also how to evaluate the efficacy and effectiveness of the evidence-based policy and practice in the area of education, sociology, administration, medicine, and public health. This will help to make better decisions for developing and utilizing the policy and practice to the sport and physical education fields. Furthermore, the application of the causality of Rubin and the propensity score in the true-experimental and quasi-experimental research designs are introduced as well as the systematic development of evidence-based models.

The Effects of Governance on Remittances: Evidence from Cross-Country Panel Data

조정환(Jung-Hwan Cho) 한국무역학회 2020 Journal of Korea trade Vol.24 No.7

Purpose - This paper empirically investigates the relationship between country governance quality and worker remittances from foreign countries. Because remittances can be a source of funds for economic development and smoothing economic crises in developing countries, the related topic has been a concern for policy-makers and academic researchers. This paper divides the motives of remittances into altruistic and investment motives through existing papers, and then considers the governance quality the remittance receiving country as one of the determinants of remittances. Design/methodology - Our empirical model considers whether governance quality can affect the volume of remittances, and uses altruistic and investment factors studied in the literature. To do this, a two-step approach is taken. First, the panel data are examined via pooled OLS, random effects, and Tobit estimation. Second, the paper reduces six governance indicators into one variable, Governance, using the principal component technique (PCA) for a robustness check. Findings - The main findings can be summarized as follows. The negative governance variable in the estimation results shows a lower governance quality that induces workers to send savings to their home countries. This means that a country with poor governance quality seems to have more remittance inflows from abroad. It also reveals that poor governance quality is more relevant to an altruistic motive rather than an investment motive, in general. The positive per capita GDP variable shows the investment motive for developed countries. Originality/value - Existing papers have focused on various factors related to the motives of remittances. However, governance quality effects on remittance inflows have not been fully studied so far. This paper considers governance quality in an estimation equation explicitly as one of the determinants of remittances. This area of study is needed, in theory and empirically, in order to fully understand the relationship between governance and remittances.

투입-산출 분석을 이용한 전력산업의 경제적 파급효과 분석

조정환 ( Jung Hwan Cho ) 포스코경영연구원 2012 POSRI 경영경제연구 Vol.12 No.1

이중차분법(Difference in Difference)을 활용한 4차 산업혁명의 고용 영향 연구

조정환(Cho, Jung-Hwan) 한국산업경제학회 2022 산업경제연구 Vol.35 No.5

본 연구는 우리나라 기업을 대상으로 4차 산업혁명이 고용에 미치는 영향을 추정하였다. 통계청의 2016년·2019년 「기업활동조사」 자료를 이용하여 4차 산업혁명 관련 기술을 도입·활용한 기업과 그렇지 않은 기업에 대해서 고용에 유의미한 차이가 존재하는지를 분석한 것이다. 첫째, 이중차분 분석 결과에 의하면 4차 산업혁명 관련 기술을 도입·활용한 기업은 기준 시점에 비해서 상용근로자 수가 감소하는 것으로 나타났다. 그러나 임시·일용근로자 수는 중소기업과 대기업 모두 증가한 것으로 분석되었다. 둘째, 회귀모형을 이용한 분석 결과에서는 4차 산업혁명 관련 기술을 도입·활용한 중소기업의 임시·일용근로자 수의 경우에만 통계적으로 유의미한 양(+)의 영향이 존재하는 것으로 분석되었다. 이러한 결과는 기존 연구에서 제시하는 바와 같이 4차 산업혁명으로 인한 자동화의 진전이 우리나라 고용의 순 증가에 영향을 미칠 수 있지만 그 효과는 주로 중소기업의 임시·일용근로자를 중심으로 이루어질 가능성이 있음을 시사한다. 그러므로 4차 산업혁명 관련 정책을 추진함에 있어서 우리나라 노동 시장의 양극화를 심화시키지 않고 소득 불평등을 확대하지 않는 정책 방향성을 고려할 필요가 있다. The purpose of this study is to analyze the effect of the 4th Industrial Revolution on employment. Using the firm data of ‘The Survey of Business Activity’ distributed by Statistics Korea in 2016 and 2019, this paper identified the significant impact on employment for Korean firms. First, according to the results of the Difference-in-Difference (DID) analysis, the number of regular workers in the firm that utilized the 4th industrial revolution technology decreased. However, the number of temporary workers was found to increase in both small and medium enterprises (SMEs) and large enterprises. Second, using the regression model the paper also identified statistically significant positive effect only on the number of temporary workers in SMEs. These results suggest that the progress in automation through the 4th industrial revolution may affect the net increase in employment in Korea, but the effect may happen to increase temporary workers in SMEs. Therefore, government policy direction related to the 4th Industrial Revolution should be considered so that the introduction and use of technologies do not increase income inequality.

볼링 국가대표 선발전 구조 분석

조정환(Jung Hwan Cho),김영철(Young Chul Kim),이훈표(Hoon Pyo Lee) 한국체육측정평가학회 2006 한국체육측정평가학회지 Vol.8 No.1

단일 반도체식 가스 센서와 패턴 인식기법을 이용한 유사 휘발유 식별을 위한 휴대용 전자후각 시스템

조정환(Jung-Hwan Cho),김영웅(Young-Wung Kim),이인수(In-Soo Lee) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.3

This paper describes a portable electronic nose (e-nose) system for use in the identification of synthesized gasoline, comprised of a single semiconductor type of gas sensor and pattern recognition NNs (neural networks). The designed e-nose system consists of a one-chip microcontroller, a pre-concentrator, and a gas sensor. A 20 dimensional data set was extracted using a temperature modulation method. A total of 50 measurements were taken, 30 of these measurement data were prepared for a training data set for a neural network and the remaining data was used for the testing data set. Two different NNs, a multi-layer perceptron (MLP) NN and a fuzzy ARTMAP NN were applied to discriminate synthesized gasoline from normal gasoline. The results of the classification showed 100% and 85% recognition rates for the training data set and testing data set, respectively. It was expected that the proposed e-nose system could be a prime candidate for testing due to its simple testing methods.

신체상(Body Image) 척도 개발 연구

조정환(Jung Hwan Cho) 한국체육측정평가학회 2006 한국체육측정평가학회지 Vol.8 No.2