Association between medical insurance and life satisfaction among middle-aged and older adults in China: the mediating role of depression

Table 4 PSM estimation results

Method	Sample	Treated	Control	ATT	S.E.	T-stat
K-nearest neighbor matching	Unmatched	3.2996	3.1003	0.1994	0.0433	4.61
K-nearest neighbor matching	Matched	3.2997	3.1034	0.1963	0.0569	3.45^**
Radius matching	Unmatched	3.2996	3.1003	0.1994	0.0433	4.61
Radius matching	Matched	3.2997	3.0940	0.2057	0.0539	3.81^**
Kernel matching	Unmatched	3.2996	3.1003	0.1994	0.0433	4.61
Kernel matching	Matched	3.2997	3.0916	0.2081	0.0530	3.93^**
Nearest-neighbor matching within the caliper	Unmatched	3.2996	3.1003	0.1994	0.0433	4.61
Nearest-neighbor matching within the caliper	Matched	3.2997	3.1033	0.1964	0.0570	3.44^**

ISSN: 1478-7547