Study on the Influence of Reform of Cultural Administrative System on the Upgrading of Urban Industrial Structure

Table 6

Placebo test.

Random variable	1 model	2 model	3 model
Random	−0.0463 (−2.823)	−0.0073 (−0.532)	0.0156 (1.308)
Control variable	NO	YES	YES
Time fixed effect	NO	YES	YES
Individual fixation effect	NO	YES	YES
Province time	NO	NO	YES
Constant term	3.7765 (25.680)	4.2764 (13.845)	2.2253 (14.707)
Observed value	4437	4437	4352
R^2	0.003	0.783	0.523