This study estimates the population distributions by per capita income in 2001 and 2011 in 111 countries. The distributions are derived from household survey data collected in each country. For most ...

The data in this study are drawn from two types of Census data both including from the long form interview of the decennial U.S. Census, which includes a broad set of demographic measures beyond the ...

一般书籍或报告在末尾可能会附上一些辅助材料，帮助读者理解正文中的内容或对正文中的内容给出更详细的解释，这些辅助材料通常被称为“附件”。在英语里 appendix、annex 和 attachment 都有“附件”的意思。它们究竟有哪些不同之处？教科书里的附件和电子 ...

It was the first day of spring break in 1992 in Phoenix, Ariz. and 12-year-old Heather Smith was excited for her family's upcoming ski trip. But before Smith and her family had even packed their snow ...