• Journal of Navigation and Port Research
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• v.40 no.6
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• pp.485-494
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• 2016

The primary purpose of this study is to analyze the impact and determinants of bilateral Free Trade Agreements on international total bulk shipment trade volume at the port of Korea using the Panel Gravity Model. The model estimates the aggregated panel data of exports and imports (excluding transshipment) as a dependent variable during the period from 1996 to 2015. GDP, GDP per capita, distances between bilateral countries, and FTA dummies are included as independent variables. And the economic integration of FTAs including ASEAN+3 and NAFTA3 countries were used as dummy variables. Study results show that GDP and GDP per capita have positive impacts on bulk shipment trade volume at the port of Korea. In addition, Korea's bilateral FTAs with Singapore, India and the United States have positive effects on total bulk trade volume in Korea. This is the so called trade creation effect. On the other hand, ASEAN+3 and NAFTA have negative effects on the total bulk trade. This is the so called trade diversion effect. Also, the distance between Korea and its trade partners has a negative impact. These findings provide insights for: further academic research, site operators who work in related trade and maritime sectors, and policy makers engaged in port and maritime operations. The results can be used to develop strategies for maximizing bulk port throughput.

• Journal of the Korea Society of Computer and Information
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• v.26 no.5
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• pp.77-86
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• 2021

This study aims at exploring the change of the total fertility rate(TFR) in regional level and analysing what different effects the local labor market and housing market have on the change of TFR. Previous studies have emphasized that the job and housing issues of the youth are structural factors on the decline of TFR. However, considering that youth problem is variant in local level, the relationship of job and housing issues with TFR could be different in local level. This study analyses what effects the situation of local labor market and housing market have on the TFR from 2012 to 2018 in regional level. The result is that the employment and housing factors have different effects on capital areas and non-capital areas. While the high cost of housing has negative effects on TFR in capital areas, it has rather positive effects in non-capital areas. However, labor market variables have statistically insignificant effects on TFR.

• Proceedings of the Korean Association for Survey Research Conference
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• 2000.11a
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• pp.93-107
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• 2000

본 연구에서는 횡단면 즉 지방자치단체별로 "고정된 효과"를 가지고 있다는 전제하에 시의 공무원 정원을 산정하였다. 본 연구에서 주장하는 시의 공무원 정원은 시 공무원 1인당 업무량에 기준한 적정정원에 대한 산출은 아니나 도시형태별로 - 일반시와 도농복합행태의 시 - 동종 시가 평균적으로 고용하고 있는 현정원에 가까운 평균 인력규모를 타단체와의 비교를 통하여 평균적인 추세를 파악했다는 점에서 의의 있는 일이다. 그러나 공무원 정원산정의 거시적 모델을 학문적으로 논의하는 것은 가능할 지 모르지만 계량적 방법의 한계가 있기 때문에 이를 현실에 적용하는 것은 정치적.사회적으로 타당성에 한계가 있다.성에 한계가 있다.

• Korea journal of population studies
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• v.28 no.1
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• pp.47-71
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• 2005

본 연구는 사망원인통계의 질과 밀접한 관련이 있는 사망진단서 첨부율이 지역간 큰 격차를 보인다는 사실에 기초하여 어떤 요인이 이 현상에 영향을 미치는지 파악하는 데 목적이 있다. 이를 위해 1991년부터 2000년까지 10개 년 간 6개 대도시 및 9개 시도의 지역별 사망진단서 첨부율과 각 지역의 사망자, 신고자 및 기타 지역 특성을 사망신고자료와 지역통계연보를 통하여 수집하였다. 이 패널자료를 분석함에 있어서 진단서 첨부율에 영향을 미치되 불가피하게 누락된 요인의 영향은 가변수를 사용하는 고정효과모형을 이용하여 보정하였다. 분석에 포함된 변수 중에서는 사망자의 교육수준과 병원사망자 비율이 사망진단서 첨부율의 지역별 차이를 낳는 주요 요인인 것으로 나타났다. 따라서 사망원인통계의 추가적인 질 제고를 위해서는 국가정책수립에 있어서 사망원인통계의 중요성에 대한 홍보 및 교육과 농어촌 벽지 및 도서 지역 등 의료이용이 여전히 어려운 지역에서의 의료기관 이용률 제고를 위한 노력을 기울여야 할 것이다.

• Journal of the Korean Data and Information Science Society
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• v.28 no.1
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• pp.1-10
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• 2017

Longitudinal data of Korean child academic achievement have been used to find the significant exploratory variables under the assumption of independent repeated measured data. Using the exploratory variables in previous research works, we analyze the linear mixed model incorporating the fixed and random effects for child academic achievement to detect the significant exploratory variables. Korea welfare panel study data observed three times between 2006 and 2012 by additional survey for children. The child academic achievement is evaluated by the sum of academic achievements of Korean, English and Mathematics. We also investigate the multicollinearity and the missing mechanism and select some popular correlation matrices to analyze the linear mixed model.

• Journal of Labour Economics
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• v.39 no.3
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• pp.99-124
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• 2016

This study analyzed the effects of labor unions on the wages of Korean female workers using 'Korean Labor and Income Panel Study.' In the estimation we considered the self-selection bias due to the women's labor force participation decision and a plausible non-response bias from not answering the question about the company size in terms of number of employees. By fixed effect estimation we found that labor unions in Korea do not increase the wages of both the female union workers and non-union workers who work at a company in which a union is organized comparing to female workers who work at company without a union. This results indicates that female workers who work in the company with labor union tend to have unobserved characteristics that are positively correlated with both wages and the probability to enter the company with labor union. We also came to the conclusion that there is no free-rider effects of non-union workers.

• (The)Korea Educational Review
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• v.24 no.1
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• pp.199-225
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• 2018

Using the 3rd to the 6th wave data from the Korean Children and Youth Panel Survey(KCYPS), we examined the effects of academic characteristics and social relations on the trajectories of the life satisfaction among adolescents. OLS results showed that male students were more satisfied with their lives than female students in the 3rd grade of middle school. As academic characteristics, academic achievement and the level of class adjustment improved life satisfaction but the amount of learning time spent had a negative effect on life satisfaction. However, the effect of academic achievement lost its statistical significance after including variables of social relations. Relationships with parents, teachers, and friends had positive effects on life satisfaction. The longitudinal analysis using the fixed effect estimation also showed a similar result of the associations among the variables to that in the OLS analysis. The life satisfaction gap between male and female students narrowed over time from the 3rd grade of middle school to the 2nd grade of high school. The effects of relationships with parents and friends showed significant effects on both female and male students, but the relationship with their teachers was significant only for female students. Based on the results, we discussed the issues of Korean education related to the life satisfaction among adolescents.

• Journal of Korean Society of Steel Construction
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• v.19 no.5
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• pp.455-462
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• 2007

The purpose of this paper is to evaluate experimentally the compressive performance of horizontal joints for light-weight hybrid panel in-filled with light-weight foamed mortar. The parameters include the presence of light-weight foamed mortar, the specific gravity of light-weight foamed mortar (0.8, 1.2), the finishing materials (light-weight foamed mortar, Oriented Strand Board [OSB], gypsum board), and the fixed shape of the hybrid panel. As the improved details for fixed end, the peak strength and the stiffness of the light-weight hybrid panel are enhanced as follows: 1.07-2.7 times in peak load, 15-24 times in initial stiffness. The peak strength of the light-weight hybrid panel obtained by the test result is in agreement with the calculations, which is the criterion value according to the domestic code.

• The Journal of shipping and logistics
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• v.35 no.1
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• pp.21-50
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• 2019

The aim of this study is to analyse a characteristic analysis of coastal passenger vessels' voyage scheduling using the Panel Regression Analysis. The GLS and Fixed Effect Analysis show that the number of canceled flights and passenger transport performance have a positive impact on the voyage scheduling, and that the freight transport performance and freight income vary from model to model. Also, through the LSDV and OLS analysis, the trend of cluster formation by regional office was confirmed. This indicates that there are frequent changes in passenger ship companies and ships, and in-depth plans are needed in various respects rather than the expansion of unconditional ships. Subsequent studies need to generate more detailed and practical results by further analysis of detailed factors, dividing them by route and vessel type.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.299-306
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• 2018

Changes in demographic and economic conditions affect corporate strategy, labor market and social welfare. The purpose of this study is to examine the effects of changes in population and economic situation on library use and to examine the income effect of library use. In order to achieve the purpose of this study, we analyzed the 10 year fixed library of public library statistics and statistical census data from 2008 to 2017 using the panel fixed effect model using the data of regional gross production and unemployment rate. And the changes in the economic and demographic characteristics of the region are used to confirm the regularity of the relationship between the changes in the usage situation of the libraries belonging to a certain region and the changes in the economic and demographic conditions in the respective regions. As a result of the analysis, the changes in the economic environment did not significantly affect the number of visitors to the library and the number of library users, but it was an important factor in the number of borrowers. This study is significant in that it shows how the economic environment changes affect the library. The result of this study is expected to be a theoretical basis for establishing the service policy of public libraries.