• Title, Summary, Keyword: 코호트 연구

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국내 코호트 현황조사

  • Bae Jong-Myeon;Hwang Seung-Sik;Yu Yeong-Geun;An Yun-Ok
    • 대한예방의학회:학술대회논문집
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    • pp.38-40
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    • 2003
  • o 만성질환을 중심으로 현재 구축, 운영중인 14개의 코호트에 대하여 정리해 보았을 때, 자발적 참여자 중심의 코호트 형태와 1만명 이상의 규모가 다수를 차지 하였다. 연구기간에 있어 최장 13년이 있지만, 최다 연구기간이 1년이라는 점에서 현재 국내 코호트 연구는 시작단계로 해석된다.

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A Study on the Determinants of the transition to Marriage of Korean Women (한국 여성의 결혼전이 시기에 미치는 결정요인 연구 - 1940, 50년대 코호트를 중심으로 -)

  • 이인수
    • Journal of Korean Home Management Association
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    • v.12 no.2
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    • pp.252-261
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    • 1994
  • 본 연구는 한국 여성의 결혼전이 시기에 미치는 개인, 가족, 사회구조의 다차원적 요인의 영향력을 추정하려는 것이다. 총 634명의 1940, 50년대 코호트 여성을 대상으로 분석한 결과, 1940년대 코호트의 경우, 다른 집단에 비해 취업률이 낮고 가족주의 가치관이 높을 때 결혼을 늦게 하고 장녀인 경우에는 제 때에 결혼하는 것으로 나타났다. 1950년대 코호트는 다른집단에 비해 성비와 취업률이 높고 교육수준이 낮을 때 결혼을 일찍하고 부의 직업이 하위적이고 결혼전 취업년수가 길 때 늦게 결혼하는 것으로 나타났다.

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Birth Cohort and Educational Differences in the Marital and Fertility Life Course in South Korea (한국의 혼인과 출산 생애과정: 출생코호트별 및 교육수준별 차이를 중심으로)

  • Woo, Hae-Bong
    • Korea journal of population studies
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    • v.35 no.1
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    • pp.151-179
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    • 2012
  • This study investigates birth cohort and educational differences in the marital and fertility life course using the Hernes model. First, lifetime marriage rates remain high across birth cohorts but men in the youngest birth cohort(1965-74) experience a somewhat significant reduction in ever-marriage rates. Second, this study also finds educational differences in lifetime marriage rates across birth cohorts. The likelihood of being never married is particularly high for poorly educated men in the youngest birth cohort but women show the opposite pattern. Third, quantum changes in the fertility transition are more likely to be the changes in higher-order births, while the changes in first and second births are mainly tempo changes. Fourth, the negative association between education and fertility is significantly larger for higher-order births. Finally, marriage and fertility show the opposite pattern in their association with education. Overall, educational differences in lifetime marriage rates become stronger across birth cohorts but the association between education and higher-order births shows the opposite pattern.

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Ontology-based Cohort DB Search Simulation (온톨로지 기반 대용량 코호트 DB 검색 시뮬레이션)

  • Song, Joo-Hyung;Hwang, Jae-min;Choi, Jeongseok;Kang, Sanggil
    • Journal of the Korea Society for Simulation
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    • v.25 no.1
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    • pp.29-34
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    • 2016
  • Many researchers have used cohort DB (database) to predict the occurrence of disease or to keep track of disease spread. Cohort DB is Big Data which has simply stored disease and health information as separated DB table sets. To measure the relations between health information, It is necessary to reconstruct cohort DB which follows research purpose. In this paper, XML descriptor, editor has been used to construct ontology-based Big Data cohort DB. Also, we have developed ontology based cohort DB search system to check results of relations between health information. XML editor has used 7 layered Ontology development 101 and OWL API to change cohort DB into ontology-based. Ontology-based cohort DB system can measure the relation of disease and health information and can be used effectively when semantic relations are found. We have developed ontology-based cohort DB search system which can measure the relations between disease and health information. And it is very effective when searched results are semantic relations.

A Birth Cohort Approach to the Household Life-Cycle Model of Residential Mobility: The Case of Jinju City (생애주기에 따른 주거이동 모형에 대한 출생코호트 접근과 해석 : 진주시를 사례로)

  • Lee, Chung-Sup
    • Journal of the Korean association of regional geographers
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    • v.17 no.1
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    • pp.75-95
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    • 2011
  • A birth cohort approach to the Household life-cycle model could be an alternative to cross-sectional data. In this study, each residential mobilities of birth cohorts' is traced by the cohort data from repeated cross-section in the case of Jinju city. Because of the differences in fertilities by era, the volume of each cohort as a consumer in housing has varied and the condition of housing stock also has changed as the time goes by. These changes in housing make not only age effect stressed in Rossi's model, but also cohort and period effect. Due to theses effects of time, every residential mobility trajectories of generations' is different especially in earlier life stages. As households get older, it is found that the age effect reduces and the probability of residential mobility is lower. As this result, the residential succession and filtering between the earlier and latter generations is weakened and the residential segregation could be happened by birth cohort.

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A comparison between the real and synthetic cohort of mortality for Korea (가상코호트와 실제코호트 사망력 비교)

  • Oh, Jinho
    • The Korean Journal of Applied Statistics
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    • v.31 no.4
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    • pp.427-446
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    • 2018
  • Korea will have a super-aged society within only 30 years according to the United Nations' definition of an aging society and the statistics on Korea's Population projections (2016), indicates that Korea has the fastest ageing speed in the world. There is a lack of data on long-term time-series data on death as related to pension and welfare policies compared to the rapid rate of aging. This paper estimates life expectancy over 245 years (from 1955 to 2200) through past and future forecasts as well as compares the expected life expectancy of the synthetic cohort and the real cohort. In addition, an international comparisons were made to understand the level of aging in Korea. Estimates of the back-projection period were compared with previous studies and the LC model to improve accuracy and objectivity. In addition, the predictions after 2016 reflected the declined mortality rate effect of Korea using the LC-ER model. The results showed an increase in life expectancy of about 30 years over 60 years (1955-2015) with an expected life expectancy of the real cohort over the second century (1955-2155) higher than the synthetic cohort. The comparative advantage of life expectancy of real cohorts was confirmed to be a common trend among comparative countries. In addition, Japan and Korea have a higher life expectancy and starting from 85 to 90 years old, all comparative countries show that the growth rate for the life expectancy of synthetic and real cohorts is less than previous years.

Population Projections for Busan Using a Biregional Cohort-Component Method (이지역 코호트-요인법을 이용한 부산광역시 장래 인구 추계)

  • Cho, Dae-Heon;Lee, Sang-Il
    • Journal of the Korean Geographical Society
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    • v.46 no.2
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    • pp.212-232
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    • 2011
  • The main objective of this study is to establish a population projection method based on the biregional cohort-component method and to apply it to population projections for Busan. Some drawbacks of using the net migration cohort-component method in a regional or local level population projection are demonstrated. A biregional cohort-component method, a variant of the interregional cohort-component method, is established as an alternative where in-migration and out-migration are separately considered and then are combined to produce a projection for the migration component. Predicated on the established method, population projections for Busan are undertaken for the period of 2005~2030 under three different scenarios. Considerably different projection results are obtained between the net migration and biregional methods; among others, the trend of population decline is more severe in the former than in the latter. An investigation of the temporal trend of the projected population shows that the proposed method is highly reasonable. In conclusion, the proposed method based on the biregional cohort-component method seems not only to be theoretically more robust than the net migration cohort-component method but also to be very effective in the real world application.

A Study of the Generational Cleavage in Welfare Attitudes: Differentiating Cohort Effect from Age Effect and Finding Its Factors (복지태도의 세대 간 균열 연구: 연령효과와 분리된 코호트 효과와 그 요인의 분석)

  • Jo, Nam Kyoung
    • 한국사회정책
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    • v.24 no.2
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    • pp.245-275
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    • 2017
  • It is attempted here to explain change in welfare attitudes for two decades in 10 countries with the cohort effect, especially differences in societal values between generations. It was found that for the last 20 years pro-welfare attitudes of the public has been strengthened, on which the generation has impact, more by the cohort effect than by the age effect, and that the Millennials/Y-generation are the strongest supporters for the state welfare. Value-differences between cohorts, as a background factor for the cohort effect on welfare attitudes, are clear but show a kind of linear trend from the older to the younger cohorts. As for the cohort effect on welfare attitudes, it is expected, at least for the short-term future, in the direction toward supporting the expansion of the state welfare. Korean welfare attitudes show an exceptional pattern - preferring income inequality as incentives, and at the same time, the expansion of governmental welfare responsibility, which echoes recent arguments of contradictoriness and non-class-orientedness of Korean welfare attitudes. Especially, Korean Millennials/Y-G shows this contradictory welfare attitudes the most strongly, which is unique between 10 countries in this study, implying their fierce competition is being internalized. It is expected that the contradictoriness of Korean welfare attitudes may limit its possibility to back up welfare expansion in Korea.

Longevity Bond Pricing by a Cohort-based Stochastic Mortality (코호트 사망률을 이용한 장수채권 가격산출)

  • Jho, Jae Hoon;Lee, Kangsoo
    • The Korean Journal of Applied Statistics
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    • v.28 no.4
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    • pp.703-719
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    • 2015
  • We propose an extension of the Lee and Jho (2015) mean reverting the two factor mortality model by incorporating a period-specific cohort effect. We found that the consideration of cohort effect improves the mortality fit of Korea male data above age 65. Parameters are estimated by the weighted least squares method and Metropolis algorithm. We also emphasize that the cohort effect is necessary to choose the base survival index to calculate longevity bond issue price. A key contribution of the article is the proposal and development of a method to calculate the longevity bond price to hedge the longevity risk exposed to Korea National Pension Services.