• Korea Trade Review
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• v.48 no.2
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• pp.71-94
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• 2023

The purpose of this study is to prove the effect of psychic distance between home country and host country on overseas foreign direct investment(OFDI) of Spanish companies through panel analysis. The panel data was based on cultural, institutional, economic, and geographical distance data over the past decade between Spain and Spain's OFDI countries. According to the Random Effect Model(REM) analysis, cultural distance(CULD) had a negative effect on OFDI, while institutional distance(INSD) had a positive effect. Among economic distances, income size distance(GDP) had a positive effect on OFDI, but export size distance(EXPO) had a negative effect. Geographic distance(PKM) had a negative impact. Meanwhile, according to the results of quantile regression analysis to prove the psychic distance effect by OFDI size, the effects of CULD and INSD in the quartile (75%) to which Korea belongs were the same as the REM analysis results. In addition, GDP and EXPO had a positive effect, and PKM had a negative effect but EXPO had a positive effect. Therefore, FDI host countries need to establish differentiated strategies through quantile analysis while making continuous efforts to improve the system.

• Journal of the Korean Society for information Management
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• v.38 no.4
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• pp.1-23
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• 2021

The purpose of this study is to analyze the effects of the bestseller ranks on the book circulations in public libraries. To achieve this goal, the weekly data sets of 179 books' library circulation and bestseller list from January 1, 2018 to December 29, 2019 were constructed based on the data collected from BigData MarketC and YES24. Three methods for analyzing panel data including linear regression, fixed-effect, and random effect models were compared, and it turned out that fixed-effect model was better than other methods. The results show that the average ranks of bestsellers were associated with their public library circulations visually. Also, the analysis of fixed-effect model showed that the single rank decline of a book on the bestseller list decreases its average circulation of 0.108 while the size of effect varied depending on subject of books. The study empirically demonstrated the impact of a bestseller list on people's book circulation behavior, suggesting that public libraries need to reference sociocultural context as well as bestseller book lists to predict library user needs and to formulate collection development policy.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.104-106
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• 2021

본 연구에서는 중국 해운·항만기업의 자본구조를 분석하기 위하여 상장된 중국 해운·항만기업 29개를 표본으로 선정하여 패널회귀분석을 활용하여 실증분석을 수행하였다. 표본으로 선정된 해운·항만기업의 재무제표 데이터는 wind자신(資訊)(wind정보)에서 구득하였으며, 29개 샘플회사의 2006년부터 2015년까지 총 10년간의 재무상태표, 손익계산서, 현금흐름표 및 주가 자료 등을 활용하였다. 실증분석을 위한 주요 변수로는 자산부채비율을 종속변수로 두었고 자산구조, 경영위험, 기업규모, 실제세율, 수익능력, 지급능력, 운영능력, 업계특성 등의 변수를 독립변수로 선정하였다. 실증분석 결과 기업규모, 수익능력, 단기지급능력(유동비율) 등의 요인이 중국 해운항만기업의 자본구조에 영향을 미치는 것으로 나타났다.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.457-465
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• 2019

The purpose of this study is to identify factors that affect the language development of infants. For the analysis, data of three years from the first year (2008) to the third year (2010) of the 'Panel Study on Korean Children (PSKC)' were constructed and panel analysis was conducted. The subjects were 2,150 infants who participated in the questionnaire, and the language development of the infants was measured using the communication scores of the K-ASQ test provided by the Korean children's panel. In addition, the factors influencing the language development of infants derived from previous studies were introduced into the model. As a result of the analysis, it is shown that the fixed effect model with fixed individual error of the panel is suitable through the Hausman test. The higher the cognitive development level of the infant, the more positive parenting behavior of the infant, respectively. The conclusions and suggestions about the characteristics of the parents and the parents affecting language development were introduced.

• The Journal of the Korea Contents Association
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• v.19 no.12
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• pp.647-659
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• 2019

The purpose of this study was to investigate the influence of children's elementary school entrance to working conditions of employed mothers. The data from 4th to 8th wave of Panel Study on Korean Children (PSKC) were used for analysis. Specifically, we examined changes in wages, working hours and regular employment of employed mothers after their children entered elementary schools. We adopted Heck selection model for unbalanced panel data after controlling sample selection bias, and compare results of analysis for unbalanced and balanced panel data. The results showed that children's elementary school entrance reduces employed mothers' wage, working hours and regular employment. These results indicate that mother tend to leave regular job and could not entry into decent job when their children are in elementary school.

• Journal of Labour Economics
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• v.38 no.1
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• pp.67-92
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• 2015

This paper empirically analyses the effect of labor union on firm's profit rate in Korea. For this purpose a panel data set has been constructed for the period of 1990-2009 using "TS2000", and the data set has been subdivided into two: one is the 'non-variant group' in which firm's union status has not changed, and the other is 'variant group' in which firm's union status has changed from non-union to union during the sample period. It has been found that for 'non-variant group' there is no significant union effect on profit rate. However, for 'variant group' the presence of union has been found to decrease firm' profit rate in terms of return on equity.

• Korea Trade Review
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• v.41 no.2
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• pp.185-202
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• 2016

Interests in renewable energy have been increasing with low-carbon policy and concerns about radioactivity. And solar energy is receiving attention as the most realistic energy in the industry. Demand for solar energy was started in Germany and European countries, and further expanding to other countries. And Korea became one of the high technology level countries in that industry. So, systematic analysis is needed for trading fact and overseas expansion of Korea's photovoltaic energy together with increased demand in the world. In this paper, we analyzed panel data for 25 years, from 1990 to 2014 from 11 countries that have track record with Korea's PV product. It is conducted based on Gravity model and matched with general report for Korean PV industry. But it shows different result for other factors.

• Survey Research
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• v.11 no.1
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• pp.43-61
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• 2010

This research estimated the variation of high school students' academic achievement by using the second to the fourth wave KEEP(Korea Education and Employment Panel) data. We explored the effects of study on academic achievement in proportion to self-regulated learning hours(except for school work and private tutoring). Analysis variables were self-directed learning(study) hours throughout senior high school and 9 grade academic achievement. We conducted Latent Growth Model(LGM) using KEEP panel data and program LISREL 8.8. Results showed that there were significant effects of self-regulated learning hours on the variation of senior high school students' academic achievement. Therefore, this was considered to be useful tips in getting the relation between students' learning and academic achievement.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.256-264
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• 2018

This study performed statistical matching using population census microdata and financial panel data. It generated the national basic data for simulation including income and property. Using this data the basic old-age pension, which is one of the biggest benefits, simulation was performed by applying the micro simulation methodology. In addition, we verified the coherence of the analysis results by comparing simulation basic data and financial panel data, basic old-age pension pilot simulation analysis results and basic old&-age pension actual beneficiary data.

• Journal of Practical Engineering Education
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• v.13 no.2
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• pp.393-403
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• 2021

The purpose of this study is to propose a method of designing a systematic panel survey at the institutional level to lay the foundation for data-based decision-making using vocational training teachers and instructors as the population. In this study, the target population and sampling frame, which are the main elements necessary for planning a panel survey, are proposed. Also based on expert advice and empirical data analysis, the sampling unit and sampling method taking into account the outer and inner variables are presented, comprehensively considering the representativeness of data, the efficiency and sustainability of data collection. As a result of the study, with the unit of the panel as a vocational training institution, a two-stage stratified proportional sampling plan is proposed so that the institution selected as the panel and the vocational training teachers and instructors belonging to the institution can participate in the survey. Based on this, implications for the panel survey sample design are presented.