• 제목/요약/키워드: Survey Bureau

검색결과 154건 처리시간 0.027초

통계청 도시가계조사의 개선을 위한 몇 가지 제언 (Suggestions for the Improvement of the Family Income and Expenditure Survey)

  • 최현자
    • 한국조사연구학회지:조사연구
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    • 제2권1호
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    • pp.129-142
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    • 2001
  • 조사연구는 소비자학에서 가장 많이 사용되는 연구방법이다. 소비자학의 영역 중 가계경제영역에서는 특히 통계청의 도시가계조사자료를 이용한 연구가 활발히 수행되고 인다. 본고에서는 통계청에서 실시하고 있는 도시가계조사의 표본구성과 내용을 살펴보고, 여기에서 발견된 문제점을 수정ㆍ보완하여 가계의 경제행위를 설명하고 예측하는데 유용하게 사용될 수 있도록 조사대상의 범위를 단독가구와 농ㆍ어가로 확대하고 소득자료의 보고를 근로자 이외의 가구에 대해서도 시행하도록 제언하는 바이다.

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Bayesian estimation of median household income for small areas with some longitudinal pattern

  • Lee, Jayoun;Kim, Dal Ho
    • Journal of the Korean Data and Information Science Society
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    • 제26권3호
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    • pp.755-762
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    • 2015
  • One of the main objectives of the U.S. Census Bureau is the proper estimation of median household income for small areas. These estimates have an important role in the formulation of various governmental decisions and policies. Since direct survey estimates are available annually for each state or county, it is desirable to exploit the longitudinal trend in income observations in the estimation procedure. In this study, we consider Fay-Herriot type small area models which include time-specific random effect to accommodate any unspecified time varying income pattern. Analysis is carried out in a hierarchical Bayesian framework using Markov chain Monte Carlo methodology. We have evaluated our estimates by comparing those with the corresponding census estimates of 1999 using some commonly used comparison measures. It turns out that among three types of time-specific random effects the small area model with a time series random walk component provides estimates which are superior to both direct estimates and the Census Bureau estimates.

Development of the KOSHA Proficiency Testing Scheme on Asbestos Analysis in Korea

  • Kwon, Jiwoon;Jang, Konghwa;Hwang, Eunsong;Kim, Ki-Woong
    • Safety and Health at Work
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    • 제8권3호
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    • pp.318-321
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    • 2017
  • This commentary presents the regulatory backgrounds and development of the national proficiency testing (PT) scheme on asbestos analysis in the Republic of Korea. Since 2009, under the amended Occupational Safety and Health Act, the survey of asbestos in buildings and clearance test of asbestos removal works have been mandated to be carried out by the laboratories designated by the Ministry of Employment and Labor (MOEL) in the Republic of Korea. To assess the performance of asbestos laboratories, a PT scheme on asbestos analysis was launched by the Korea Occupational Safety and Health Agency (KOSHA) on behalf of the MOEL in 2007. Participating laboratories are evaluated once a year for fiber counting and bulk asbestos analysis by phase contrast microscopy and polarized light microscopy, respectively. Currently, the number of laboratory enrollments is > 200, and the percentage of passed laboratories is > 90. The current status and several significant changes in operation, sample preparations, and statistics of assigning the reference values of the KOSHA PT scheme on asbestos analysis are presented. Critical retrospect based on the experiences of operating the KOSHA PT scheme suggests considerations for developing a new national PT scheme for asbestos analysis.

아까시나무 임분의 시계열적 생장 모니터링 및 벌기령 도출 (Periodic Growth Monitoring and Final Age at Maturity in a Robinia pseudoacacia Stand)

  • 김재엽;김소라;송정은;성상민;임종수;손영모
    • 한국산림과학회지
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    • 제111권4호
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    • pp.613-621
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    • 2022
  • 본 연구는 5차, 6차, 7차 국가산림조사 자료 중 아까시나무가 우점종인 표본점을 수집하여, 산림조사 차수별, 기후대별(온대 북부, 온대중부, 온대남부, 난대지역), 해발고별(100 m 단위) 흉고직경, 입목본수, ha당 재적 및 지위지수의 변화를 구명하고자 하였다. 또한 용재로서 사용을 위한 기준인 벌기령을 산정하였다. 그리고 변화 구명은 통계처리 기법 중 분산분석과 Duncan 검정으로서 이행하였다. 흉고직경의 변화를 보면, 당연히 산림조사 차수에 따라 증가하였고, 기후대별로는 온대남부 지역에서 가장 생장이 좋지 않았으며, 해발고별로는 301-400 m 지점에서 가장 생장이 떨어지는 것으로 나타났다. ha당 입목밀도는 산림조사 차수별, 해발고에 따라서 서로 간 차이를 보이지 않았으며, 온대중부 지역에서 밀도가 가장 높고, 온대남부 지역이 가장 낮은 밀도를 보였다. ha당 임분재적은 산림조사 차수에 따라 증가하였고, 온대북부·온대중부 지역과 온대남부·난대 지역으로 크게 두 그룹으로 구분되며, 해발고 201-300 m에서 재적생장량이 가장 높았다. 지위지수는 ha당 임분재적 변화와 유사한 결과를 보여 주었다. 그리고 아까시나무의 ha당 재적변화를 알 수 있는 생장량 곡선은 Weibull 함수식으로 추정하였으며, 임분재적은 임령 50-60년에 이를 때 약 200 m3에 달할 것으로 예측되었다. 아까시나무를 밀원 자원이 아닌 용재로 이용하기 위한 기준인 재적수확최대벌기령을 계산한 결과 34년으로 나타났다.

Measurement Error Variance Estimation Based on Complex Survey Data with Subsample Re-Measurements

  • Heo, Sunyeong;Eltinge, John L.
    • Communications for Statistical Applications and Methods
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    • 제10권2호
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    • pp.553-566
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    • 2003
  • In many cases, the measurement error variances may be functions of the unknown true values or related covariates. This paper considers design-based estimators of the parameters of these variance functions based on the within-unit sample variances. This paper devotes to: (1) define an error scale factor $\delta$; (2) develop estimators of the parameters of the linear measurement error variance function of the true values under large-sample and small-error conditions; (3) use propensity methods to adjust survey weights to account for possible selection effects at the replicate level. The proposed methods are applied to medical examination data from the U.S. Third National Health and Nutrition Examination Survey (NHANES III).

수입식품 안전관리에 대한 소비자 인식도 조사 (Survey on the Perception of Consumers on Imported Food Safety Management)

  • 장민선;강은진;조미영;최계선;홍영표;서갑종;김건희
    • 한국식품영양과학회지
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    • 제38권11호
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    • pp.1625-1632
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    • 2009
  • 본 연구에서는 수입식품에 대한 인식을 조사하고, 수입식품 안전관리 개선점을 제안하고자 하였다. 서울, 용인, 천안, 대구, 부산, 광주 그리고 강원도에 거주하는 소비자 1065명을 대상으로 설문조사를 실시하였으며, 통계처리는 S-Plus 8.0을 통하여 분석하였다. 조사대상자의 일반사항, 수입식품 확인과 범위에 대한 인식도, 구입 시 가장 고려하는 사항 및 안전성 확보를 위하여 개선되어야 할 부분 등 12가지 문항에 대하여 조사하였다. 수입식품 구입 시, 수입식품인지 반드시 확인하는 경우는 35.7%, 가장 고려하는 사항은 원산지(56.7%)였으며, 수입식품 위해요인 중 가장 큰 것은 유해한 식품첨가물의 미확인(35.7%)이었다. 안전문제 발생 시, 어떤 내용인지 잘 알아본 후에 구입을 결정하는 경우는 50.0%였으며, 방송매체를 통하여 정보를 가장 많이 습득(53.3%)하였다. 안전성 확보를 위하여 개선되어야 할 부분은 수입 시 검사 강화(30.4%)였고, 제한적 정보 제공(42.3%)으로 인한 소비자 불만이 높았다. 전반적인 수입식품에 대한 소비자들의 우려가 높았으며, 이에 따른 엄격한 검사관리 기준과 제도적인 뒷받침이 필요하다고 사료된다.

Who has experienced better or worse health conditions since the outbreak of COVID-19?: results from a representative cross-sectional survey in Seoul

  • Eunbin Jo;Hyelim Yoo;Kirang Kim;Sunup Kim;Chul-Kyoo Kim;Haeyoen Lee;Jinsook Jeong;Sohyun Park
    • Nutrition Research and Practice
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    • 제17권1호
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    • pp.103-121
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    • 2023
  • BACKGROUND/OBJECTIVES: The coronavirus disease 2019 (COVID-19) pandemic has affected the entire world population in many ways. This study aimed to analyze the patterns of changes in eating, food purchasing and preparation, physical activity, and subjective health after COVID-19 outbreak by various sociodemographic factors and to understand the factors associated with changes in subjective health. SUBJECTS/METHODS: A cross-sectional survey using a representative sample from Seoul was used for the analysis. The data collection was conducted from September to October 2020. A total of 3,833 citizens aged more than 18 years old participated in the Seoul Food Survey. Descriptive statistics and generalized ordinal logistic regression models were used to understand the changes in health behaviors, health indicators, and subjective general health by various socioeconomic status. RESULTS: It was shown that the changes in household income, food expenditure, food consumption and physical activities differed significantly by age, education, occupation, income, weight, and food security status. Low-income and food-insecure households were affected more severely by the pandemic. Older age, household food insecurity, income reduction, increased home cooking and frequency of having instant foods, decreased physical activity and weight gain were significant factors explaining worse perceived health during the COVID-19 pandemic. CONCLUSIONS: The results suggest that focusing on older populations and low-income families with food insecurity should be prioritized during infectious disease outbreaks. In addition, the role of physical activities and instant food consumption in explaining perceived health should be investigated further in this prolonged battle with the pandemic situation.

국내 유통 주요 사과나무 묘목의 바이러스 감염 실태 (Survey on Virus Infection for Commercial Nursery Trees of Major Apple Cultivars in Korea)

  • 이성희;권의석;신현만;남상영;홍의연;김병관;김대일;차병진;차재순
    • 식물병연구
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    • 제23권4호
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    • pp.355-362
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    • 2017
  • 국내에서 유통되고 있는 사과나무 묘목의 바이러스 감염 실태를 파악하기 위하여 사과 '홍로'와 '후지' 및 '후지' 아조변이 품종을 구입하여 5종류의 바이러스에 대한 감염 여부를 검정하였다. 그 결과, '홍로' 품종의 접수 부위는 ACLSV, ASPV 및 ASGV에 각각 100%, 81.3% 및 100%의 감염률을 보였고 ApMV와 ASSVd에는 전혀 감염되지 않았다. '홍로' 품종의 대목 부위에 대하여, ACLSV, ASPV 및 ASGV의 감염률은 각각 87.5%, 81.3% 및 100%이었고 ApMV와 ASSVd의 감염률은 각각 12.5% 및 6.3%이었다. '후지' 품종 및 '후지' 아조변이 품종의 접수 부위는 ACLSV, ASPV 및 ASGV에 각각 86.7%, 86.7% 및 100%의 감염률을 보였고 ApMV와 ASSVd에는 전혀 감염되지 않았다. 대목 부위는 ACLSV, ASPV 및 ASGV에 각각 86.7%, 93.3% 및 93.3%의 감염률을 보였고 ApMV와 ASSVd에 대한 감염률은 각각 12.5%와 6.3%이었다.

Contemporary Chinese Households' Food Away From Home Expenditure and Becker's Household Production Theory

  • Kim Eon-Jin;Chern Wen S.
    • International Journal of Human Ecology
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    • 제6권1호
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    • pp.17-28
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    • 2005
  • This study examines factors determining contemporary Chinese households' food away from home (FAFH) expenditures using Becker's household production theory. Data came from the 2000 urban household survey in Guangdong Province, collected by National Bureau of Statistics (NBS) of China. It was revealed that the contemporary urban Chinese wives also substitute their household work by time-saving product, FAFH, as Becker's household production theory postulated. This suggests the important role of time-value (opportunity cost) in determining household FAFH expenditure across the cultures.

Safety Climate and Occupational Stress According to Occupational Accidents Experience and Employment Type in Shipbuilding Industry of Korea

  • Kim, Kyung Woo;Park, Sung Jin;Lim, Hae Sun;Cho, Hm Hak
    • Safety and Health at Work
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    • 제8권3호
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    • pp.290-295
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    • 2017
  • Background: Safety climate and occupational stress are related with occupational accident. The present study tried to identify the differences in safety climate and occupational stress according to occupational accidents experience and employment type (e.g., direct workers and subcontract workers). Methods: In this study, we conducted a survey using safety climate scale and Korean Occupational Stress Scale and classified the participants into four groups: direct workers working for accident-free departments, direct workers working for accident departments, subcontract workers working for accident-free departments, and subcontract workers working for accident departments for 2 years within the same workplace in the shipbuilding industry. Results: The direct workers and subcontract workers showed diverse results in subscales of safety climate and occupational stress. This result is supported by existing studies; however, further study is necessary for more supporting evidence and elaborative methodological approach. Conclusion: The necessity of management for safety climate and psychosocial factor such as occupational stress for both direct workers and subcontract workers as a whole is suggested by this study.