From: Payments for ecological restoration and internal migration in China: the sloping land conversion program in Ningxia
Migration share
Participating group
Non-participating group
Difference between groups
Year 2002
17.2%
24%
-6.8%
Year 2008
28.3%
17.6%
10.7%
Difference between years
11.1%
-6.4%
DD=17.5%