Cleaner Production Standards and Increased Technical Complexity for Textile Exporters

Table 4

Robustness test.

	(1) Tightening policy year identification conditions	(2) Excluding policy interference	(3) Placebo test	(4) Pure samples
	ESI	ESI	ESI	ESI
Treat × post	0.6967	0.5959	0.0118	0.8251
	(0.0000)	(0.0024)	(0.8423)	(0.0016)
Control variables	Yes	Yes	Yes	Yes
Enterprise fixed effect	Yes	Yes	Yes	Yes
Year fixed effect	Yes	Yes	Yes	Yes
R^2	0.9578	0.9563	0.6012	0.9615
Observations	48774	17863	14166	6200