• Journal of the Korean Association of Geographic Information Studies
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• v.12 no.2
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• pp.120-131
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• 2009

This study measured the centripetal force and effective scope of the population spread from urban center and subcenters in order to diagnose the urban spatial structure of the formation of a multicentric city structure in Busan. The study analyzed the variability of the determination coefficient value (R square) with a negative exponential function derived from the population density model by extending the circular region into 5-km units. The aim of this study was to measure changes in the effective scope of the population centripetal force of the urban center and subcenter in 5-year intervals from 1995 to 2005 using census data. The explanatory adequacy of the population density function was examined with the bias of the function to calculate the distance error between the real location of the urban center and the optimal location, according to the population density function. To summarize the results, the value for the area of Jungangdong showed a continuous reduction, whereas Seomyeon (Bujeondong) maintained explanatory adequacy without a large change. As a whole, Busan was in the process of continuous diversification, in spite of its reduced population. Therefore, it appears necessary to strengthen the function of the urban center and subcenter and to supply adequate dwelling zones close to downtown to form a more efficient urban spatial structure. The results of the present study will be utilized as basic data for the formulation of a political approach to the efficient reorganization of spatial structure by correlating concrete spatial information with the population variability of Busan's urban center and subcenter.

• Korea journal of population studies
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• v.24 no.2
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• pp.5-45
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• 2001

Population and the environment are the basic elements of a human ecological system having intrinsic links between them. But, research on their relationships is very limited in both quantity and depth. Although the concern on the topic has grown recently, most discussions lack analytical perspectives and are largely descriptive. The tendency is blamed for problems involved in defining the term, the environment, and the paucity of data on environment. In Korea, the limitation is much grater and, therefore, this study sets a moderate aim: That is, to explore, from ecological perspectives, various implications of population change on the environment in 20th century Korea. More specifically, it examines the related theoretical discussions, the major features of population change, and changes in environmental conditions that can be assumed to have direct or indirect links with population size and urbanization. Official statistics and newspaper articles on various environmental issues consist of the major data sources.

• Korea journal of population studies
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• v.33 no.1
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• pp.161-189
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• 2010

Dealing with uncertainty has been a critical issue in demographic and population forecasting since 1980. This study reviews methodological developments in demographic and population forecasting over the last several decades. First, this study reviews the important issue of the uncertainty surrounding demographic forecasts. Several limitations of the traditional scenario approach to dealing with uncertainty are also discussed. Second, in forecasting demographic processes such as mortality, fertility, and migration, three approaches of stochastic forecasting are identified and discussed: expert judgment, statistical modeling, and analysis of historical forecast errors. Finally, this study discusses the current issues and directions for future research in stochastic demographic forecasting.

• Survey Research
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• v.10 no.2
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• pp.71-96
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• 2009

This paper examined the accuracy of the national population projections for the Republic of Korea produced from the 1980s to the early 2000s. Specifically, this study assessed the forecast accuracy of the Total Fertility Rate and life expectancy at birth as well as total and age-group populations. Overall, the data indicated no significant improvement in forecasting total populations. The largest forecast errors were for the young and the elderly, while projections of the working age population were comparatively accurate. The past population projections consistently over-estimated TFR but under-estimated life expectancy at birth. This study also showed that forecast errors in fertility were substantially larger than those in mortality, indicating that behaviorally determined factors are difficult to forecast.

• Journal of Labour Economics
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• v.36 no.3
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• pp.65-96
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• 2013

Analysis based on the Korea Labor and Income Panel Survey data reveals that earnings have become less volatile since the exchange rate crisis, while they have become more unequal. The reduction in measured earnings volatility is not explained by changes in the composition of various economic/demographic groups but accounted for by within-group reduction in the measured earnings volatility, which in turn is attributed to the reduced earnings mobility during the sample period. It is also found that measured earnings volatility is countercyclical and earnings changes are symmetric even during recessions.

• Spatial Information Research
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• v.20 no.2
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• pp.93-103
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• 2012

Recently metropolitan cities pursue multi centric urban spatial structure for sustainable development and efficient urban management. Thus, this study calculated population potential using data on population distributed among road nodes for the last 50 years, and based on the results. We measured the spatial variability of the multi centric structure of Busan Metropolitan City. According to the results, the multi centralization process has been continued up to recently in Busan Metropolitan City. As population potential is concentrated on sub centers, Hadan, Gupo and Haeundae areas were playing an increasingly powerful role as the center of the respective district, and Sasang and Dongrae had been losing their role as the center of their respective districts since 2000 and 1990, respectively. Additionally, in all the multi centric districts except Haeundae was observed the increase of oblongity, which is the change of spatial structure in an unbalanced way toward a specific area or direction.

• The Korean Journal of Applied Statistics
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• v.33 no.2
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• pp.185-201
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• 2020

Scenario population projection reflects the high probability of future realization and ease of statistical interpretation. Statistics Korea (2019) also presents the results of 30 combinations, including special scenarios, as official statistics. However, deterministic population projections provide limited information about future uncertainties with several limitations that are not probabilistic. The deterministic population projections are scenario-based estimates and show a perfect autocorrelation of three factors (birth, death, movement) of population variation over time. Therefore, international organizations UN, the Max Planck Population Research Institute (MPIDR) of Germany and the Vienna Population Research Institute (VID) of Austria have suggested stochastic based population estimates. In addition, some National Statistics Offices have also adopted this method to provide information along with the scenario results. This paper calculates the demographics of Korea based on a probabilistic or stochastic basis and then draws the pros and cons and show implications of the scenario (deterministic) population projections.

• Journal of the Korean Geographical Society
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• v.51 no.4
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• pp.525-539
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• 2016

This study attempts to predict the changes in the spatial distribution of occupational employment in Korea by applying Markov Chain Model. For the purpose we analyze the job-related migration pattern and estimate the transition probability with the last six years job-related migration data. By applying the Chapman-Kolmogorov equation based on the transition probability, we predict the changes in the spatial distribution of occupational employment for the next ten years. The result reveals that the employment of professional jobs is predicted to increase at every city and region except Seoul, while the employment of elementary labor jobs is predicted to increase slightly in Seoul. In particular, Gangwon-do and Chuncheongdo are predicted to increase in the employment of all occupational jobs.

• Korea journal of population studies
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• v.18 no.1
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• pp.119-165
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• 1995

가구는 주택과 내구소비재 구입의 단위가 되기 때문에 장래의 가구수에 대한 자료는 정부가 주택정책을 수립하거나, 기업체가 가전제품이나 가구를 생산하는 장기 계획을 짜는 데 필요불가결한 정보 중 하나이다. 우리 나라는 현재 심각한 주택난을 겪고 있으며 이 주택난은 가구의 급증과 떼어 놓고 생각할 수 없다. 최근 우리 나라의 주택난 해소에 대한 합리적인 대책을 수립하자면 정확하고 상세한 가구추계가 요청된다. 그리고 경제적으로 취약한 계층인 노년인구가 급증하고 있는 것과 관련해서 노인가구의 증가가 예상되고 있는데 이들을 대상으로 하는 각종 사회복지정책의 수립에는 전반적인 가구구조와 노인가구에 관한 정확한 예측이 절실하게 요청되고 있다. 본 연구는 단순한 가구수 추계뿐만 아니라 가구구조 및 혼인상태별로 다양하게 가구수를 추계할 수 있는 비교적 간편하면서도 신뢰성을 인정받고 있는 고노(Kono)의 확장된 가구주율법을 사용하고 최근의 센서스 자료를 활용하여 가구수 추계를 실시하였다. 이 연구에서는 지난 30년간의 가구구조의 변동을 분석하고 1990년 이후 10년간 우리 나라의 시·도별 가구수를 전망하며, 노인가구를 위시한 가구형태별, 가구규모 및 혼인상태별로 가구수를 추계하고 있다. 아무쪼록 이 연구결과가 지방자치화에 따른 지역 주택정책 수립 및 노인복지 등 각종 사회복지정책의 수립에 필요한 자료로써 널리 활용되기를 바란다.

• Journal of the Korean Geographical Society
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• v.47 no.1
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• pp.98-120
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• 2012

The main objective of this study is to conduct subnational population projections of Korea based on a multiregional cohort-component method. This objective is accomplished by: (i) establishing a viable framework to implement the multiregional cohort-component method with reference to the Markov chain model and Rogers' multiregional population projection model; (ii) applying the established framework to subnational population projections of Korea, 2005~2030. The main results are twofold. First, the proposed method turns out to be highly valid in a methodological sense, which is seen from a high level of coincidence between the estimated and the observed. Second, the projection results turn out to be highly useful in the sense that interregional migration flow matrices are resulted for projection periods. The projected migration flows are expected to provide invaluable information for an understanding of future population change and for a formulation of policy alternatives. This study is strongly inspired by the multiregional perspective emphasizing the evolution of multiple regional populations interconnected by interregional migration flows rather than the overall national change.