Analysis on the Relationship between Financing Constraints and Research and Development from the Perspective of the Location of Top Management Network

Table 2

Descriptive statistics of variables.

Variable	Obs	Mean	Std. Dev.	Min	Max
RD	5773	0.052	0.135	0	1.067
FC	5773	0.508	0.167	0.229	0.994
SH	5773	0.415	0.216	0.077	1.62
Lev	5773	0.445	0.282	0.007	11.51
ROA	5773	0.044	0.35	−11.296	22.005
Cash	5773	0.249	0.185	0.006	1.079
Cen	5773	0.581	0.153	0.222	0.951
Dual	5773	0.247	0.431	0	1
Age	5773	2.111	0.877	0	3.296
Size	5773	22.002	1.201	14	28.243
SOE	5773	0.473	0.499	0	1
Mstock	5773	0.042	0.109	0	0.791
Rev	5773	15.292	0.843	0	18.771