Estimating Net Migration By Ecosystem and By Decade: 1970‐2010

GSTDTAP > 资源环境科学

	Estimating Net Migration By Ecosystem and By Decade: 1970‐2010
	Dr. Tanja Srebotnjak
	2011
出版年	2011
页数	93
语种	英语
国家	德国
出版者	Ecologic Institute, Germany
领域	资源环境
英文摘要	Tanja Srebotnjak, Senior Fellow at Ecologic Institute, contributed to a project undertaken by the Columbia University Center for International Earth Science Information Network (CIESIN) to estimate net migration by ecosystem over the four decades from 1970 to 2010. The project report is available for download.Because of the lack of globally consistent data on migration, indirect estimation methods were used. The novel approach relied on a combination of data on spatial population distribution for five time slices (1970, 1980, 1990, 2000, and 2010) and sub-national rates of natural increase in order to derive estimates of net migration which were then summed by ecosystem. Tanja Srebotnjak provided statistical expertise in the imputation of missing urban and rural crude birth and death rates as well as general input to other methodological aspects. The imputation algorithm produced multiple imputations of the cross-sectional time series using sets of individual explanatory variables. Together with the results from an alternative approach taken by researchers at Columbia University the final imputations were merged and produced initial results that are the subject of the project report [pdf, 4.6 MB, Englisch].
英文关键词	migration ecosystems population distribution
URL	查看原文
来源平台	Ecologic Institute (EU)
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/2575
专题	资源环境科学
推荐引用方式 GB/T 7714	Dr. Tanja Srebotnjak. Estimating Net Migration By Ecosystem and By Decade: 1970‐2010:Ecologic Institute, Germany,2011.