Regressions of V<sub>a</sub>, V<sub>b</sub> and V<sub>d</sub>.
收藏NIAID Data Ecosystem2026-03-08 收录
官方服务：
资源简介：
aResidents in China are legally separated into urban and rural residents. bSeverity of desertification. cQ1: Do you feel some improvement of the natural environment in your county relative to previous years? Q2: Which is the main reason in your opinion about the desertification in your county? Q3: Do you think that implementation of ecological protection policies plays an active role for the environment or not in your county? d** and *** indicate the significance at 5% and 1% level respectively.
创建时间：
2013-10-31
