한국의 기업가 특성 성과 예측 모델 비교연구 - 제조업, 건설업 및 기술산업을 중심으로

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2007 한국산업경영시스템학회지 Vol.30 No.3

  Entrepreneurship is considered as the main leadership creating enterprises and employment. However, in Korea empirical studies linking Korean entrepreneurial performances with her characteristics are rarely in existence. Current study focuses on Korean entrepreneurs in manufacturing, construction and other technologically intensive (MCOT henceforth) industries compared to entrepreneurs in service and other technologically less intensive (SOT henceforth) industries and to professional/technical wage workers and examines effects of human capital, demographic, and risk-taking characteristics on earnings. Education premium is higher for entrepreneurs in MCOT industries than for professional/technical workers, even though science and engineering diploma pays better in the latter, and that concentration in college causes more selection into the latter occupational family. In terms of education premium and effects of other characteristics SOT industry entrepreneurship and self-employment appear to be lower grade occupational families, even though there appear to be significant comparative advantages working in their selection.

이민의 직업선택모델 비교연구:미국의 과학기술직 사례

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.2

  기술집약적인 경제성장의 중요성이 강조되고 있는 가운데 이공계 진학과 과학기술직종선택의 감소는 성장잠재력에 가장 근본적인 위협이 된다. 이를 유지하려는 여러 가지 정책이 교육학적이나 사회학적 근거에서 제시되고 있으나 이를 분석하는 이론적 경험적 틀이 상대적으로 부족한 상태이다. 직업선택모델은 사회학적인 접근법이 활발하게 진행되었으나, 경제적 동인에 대한 분석이 부족하다. 본 논문에서는 2000년 미국 센서스 데이터에 나타난 가장 국제화된 미국의 과학기술직 사례를 통해 인적자본 모델을 기준으로 하여 기술직에 대한 기존의 연구와 비교한다. 이민의 직업선택모델의 관점에서 원주민의 경우와 비교하며, 동시에 타 직업군과 비교한다. 직업선택에서 미래소득에 대한 예측이 대체로 정확하나 실제의 선택이 다르다는 기존 논문들의 주장은 성간 차이의 문제를 제외하고는 현격하지 않다. 민족적 차이의 효과도 인적자본효과에 비해서는 크지 않다. 과학기술직은 고급 화이트칼라 직종에 비해 결혼과 교육 언어 경험면에서 저급한 직종의 특성을 보인다. 여성의 과학기술직 기피는 남성프리미엄이 높아서는 아니지만 합리적인 차별 때문으로 볼 수 있다.

The Influence of After-Sales Service Quality on Customer Satisfaction and Loyalty in Mobile Phone

Jae jun Lee(이재준),Ji-Hyun Ryu(유지현),Sae-Jae Lee(이세재),Hyun-Seung Oh(오현승),Jin-Hyung Cho(조진형) 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.4

This study aims to configure what dimensions make up for smart phone after service quality, and how this service quality affects customer satisfaction and customer loyalty. Smart phone market is a market of the device leading the digital convergence as well as positioning itself as one of the national growth driving industry. To survive in this matured market, companies should have to respond actively to radical changes and customers needs in the so-called Smart Revolution environment. Lately, however, the smart phone market is prospected to move from growth phase to mature phase by the scholars. In order to proactively respond to the change in such market condition, companies need to provide absolute advantage in customer loyalty over their competitors by revolutionizing the after-sales service quality. Qualified A/S will lead to service satisfaction and achieve customer loyalty. The empirical analysis results obtained through A/S quality are as follows : First, human quality (attitude, expertise, problem-solvability), environment quality (handling agility, convenience, comfort), serv-ice policy quality (quality guarantee, additional service operation) are dimensions that make up for A/S quality. Second, A/S quality dimension showed a significant positive influence on service satisfaction and A/S satisfaction showed a positive influence on customer loyalty as well. Based on this empirical study, we propose some implications for A/S quality improvement. First, human quality dimension has relatively higher influence on A/S satisfaction in case of free A/S, so companies need to solve the product problem completely when consumer’s first visit by continual employee education. Second, in case of paid A/S, the service policy quality-especially A/S Warranty period- has higher influence on A/S satisfaction.

기술기업가의 소득특성 : A-1 인간/감성/안전 : 미국의 아시안사례

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2011 한국산업경영시스템학회 학술대회 Vol.2011 No.-

기업가선택을 높이는 요인들 중 인적자본가설은 다양한 지식축적을 통해 기업가가 되고 이는 소득을 높인다고 주장하는 반면 기호가설은 다양한 활동에 대한 기호 때문에 기업가가 되지만 예상소득이 피고용 상태보다 저조할 것으로 본다. 기술기업의 경우 전문성에 대한 이득이 커서 이러한 효과들은 약화될 수 있다. 이민의 경우 고용차별압력에 의한 자영선택가능성도 증가할 수 있다. 의료를 제외한 과학기술직의 자영업을 기술기업가로 보고 이의 소득방정식을 미국 인구센서스 데이터에 대해 추정하여 기업가 이론중 인적자본 가설과 기호가설, 차별요소, 선택편이를 비교추정 하였다. 특히 미국 기술기업 내 비중이 커지고 있는 아시아인을 백인집단과 비교하여 소득을 분해 비교하였다. 기업가선택에 대한 인적자본가설이나 자기선택에 의한 경쟁적 가설보다는 떠돌이 가설의 가능성이 크게 보인다.

Science & Engineering Degrees and Human Resource Element Value Estimation in Technology Jobs : the US Case

Sae Jae Lee(이세재),Hyun Soo Lee(이현수) 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.4

In the international businesses human resource elements acquired in different countries might have different values in varied industries due to the different quality of education and experiences in the original countries. Using selection models to evaluate expected values in earnings equation of human resource elements such as education and experiences etc. acquired in sending countries, system equations are expanded to examine also the values of science and engineering degrees in technology jobs with selectivity bias correction. This paper used the US census survey data of 2015 on earnings, academic degrees, occupations etc. The US has long maintained the policy of accepting more STEM workers than any other countries and helped maintaining own technological leadership. Assuming per capita GDP gap between the sending country and the US downgrades immigrant human resource quality, it rarely affects occupational selection but depresses earnings on average by two or more years’ worth of education. Immigrant quality index in the sense of GDP gap appears to be a valid tool to assess the expected earnings of the worker with. Engineering degrees increase significantly the probability of selecting not only engineering jobs but also general management jobs, as well as increasing the expected earning additionally over nine years’worth of education. Getting a technology job is additionally worth about four years of education. Economics and business degrees are worth additionally almost six years of education but humanities degrees depress expected earnings. Since years after immigration does not very fast enhance earnings capacity, education level and English language ability might be more useful criteria to expect better future earnings by.

재미한인의 인적자본 및 직업특성과 과학기술직 두뇌유출

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2008 한국산업경영시스템학회 학술대회 Vol.2008 No.하계

In science and engineering programs in the U.S. in 2000 China, South Korea and India were top countries of origin sending students. More than half of the students intend to stay in the U.S. Immigration, education and occupational choices all have human capital aspects that require investments. A framework is proposed where expected incomes in both countries of origin and destination are calculated and used to reflect the substitution effect and the wealth effects of the expected incomes of two countries. It appears that nonpecuniary effects of education encourages immigration as much as pecuniary effects in the immigration decision equation. After the pecuniary effects are accounted for there is some negative nonpecuniary tendency of the professional scientists to immigrate to the U.S.

기술기업가의 인적자원가설비교

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2011 한국산업경영시스템학회지 Vol.34 No.4

Human resource theories of becoming entrepreneurs or self-employed rather than finding employment are compared as applied to fit the occupational data of technological entrepreneurs and technology jobs. The human capital theory posits that technological entrepreneurs are prepared to become a jack-of-all-trades with a variety of fields of education. Hobo theory of entrepreneurship assumes that entrepreneurs have strong taste against concentrating on a few activities, which tend to drive entrepreneurs away from employed jobs depressing their expected income. Another theory assumes that entrepreneurs have some unobserved productive qualities and abilities over employed people. Immigrant entrepreneurs could presumably be pressured out of employment under racial discrimination. Since technology jobs are mostly filled by those educated in the science and technology fields, and they presumably offer great reward to professional concentration, technological entrepreneurs may not benefit from becoming jacks-of-all-trades compared to finding employment in technological jobs income-wise. Asian immigrants in the 2000 US Census data are compared to white immigrants in technological jobs to test alternative human resource theories of entrepreneurship. Using English language ability as a proxy for the variety of education, I find in the white immigrant technological entrepreneurs support for the jack-of-all-trades theory, while in the Asian immigrant technological entrepreneurs hobo theory is supported. In the Asian technological workers only there appears the significant self-selection or comparative advantage component, while at the same time discriminatory components are significant.

미국 과학기술직의 선택특성

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.4

Brain drain of scientists and technologists to the United Sates from other countries is a phenomenal issue due to the potential developmental impacts it could have on sending countries Immigration policies undoubtedly play the major part to shape the human resource outcomes There has been a common sense explanation to the brain drain trend, which states that the lower English language requirements in the scientific and technology jobs compared to other high skill brain drain jobs offer immigrants more favorable employment opportunities These and other language related variables are used with standard human capital model variables to assess the validity of the common sense proposition

재미한인의 인적자본 및 직업특성과 과학기술직 두뇌유출

이세재(Sae-Jae Lee) 한국산업경영시스템학회 2008 한국산업경영시스템학회지 Vol.31 No.4

In science and engineering programs in the U.S. in 2000 China, South Korea and India were top countries of origin sending students. More than half of the students intend to stay in the U.S. Immigration, education and occupational choices all have human capital aspects that require investments. A framework is proposed where expected incomes in both countries of origin and destination are calculated and used to reflect the substitution effect and the wealth effects of the expected incomes of two countries. It appears that nonpecuniary effects of education encourages immigration as much as pecuniary effects in the immigration decision equation. After the pecuniary effects are accounted for there is some negative nonpecuniary tendency of the professional scientists to immigrate to the U.S.

제조업의 주기성 시계열분석에서 힐버트 황 변환의 효용성 평가

이세재(Sae-Jae Lee),서정렬(Jung-yul Suh) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.2

Real-life time series characteristic data has significant amount of non-stationary components, especially periodic components in nature. Extracting such components has required many ad-hoc techniques with external parameters set by users in case-by-case manner. In our study, we evaluate whether Hilbert-Huang Transform, a new tool of time-series analysis can be used for effective analysis of such data. It is divided into two points : 1) how effective it is in finding periodic components, 2) whether we can use its results directly in detecting values outside control limits, for which a traditional method such as ARIMA had been used. We use glass furnace temperature data to illustrate the method.