표 2. DID 및 PSM-DID 모형 추정 결과

구분		DID 모형			PSM-DID 모형
		Coeff.	SE	t-value	Coeff.	SE	t-value
DID변수	TREATMENT	0.210**	0.006	36.953	0.133**	0.008	16.222
	TIME	0.044**	0.005	8.893	0.061**	0.008	7.843
	TREATMENT×TIME	0.016**	0.005	3.007	0.015*	0.007	2.028
AIC		2,327.200			2,298.124
BIC		2,457.398			2,417.188

p<0.05
p<0.01.