From: Association between the location of social medical insurance and social integration among China’s elderly rural migrants: a nationwide cross-sectional study
Methods
ATT
SD
z
P value
K-neighbor matching(k = 4, caliper = 0.02)
6.47
2.017
1.960
0.049
Radius caliper l matching(caliper = 0.01)
6.52
1.749
2.010
0.003
Kernel caliper matching (caliper = 0.01)
1.635
2.350
0.019