产品结构演化的跨界效应研究——基于中国地级市出口产品的实证分析

贺灿飞, 任永欢, 李蕴雄

The Mechanism of Cross-boundary Product Evolution in China: An Empirical Analysis Based on Export Product of Prefecture-level Cities

Canfei He, Yonghuan Ren, Yunxiong Li

表2 分地区分产品模型估计结果

Table 2 The estimation results of different areas and different products

	模型 ④	模型 ⑤	模型 ⑥	模型 ⑦	模型 ⑧
$\begin{matrix} L Q_{c, i, t} \end{matrix}$	0.247^***	0.313^***	0.361^***	0.419^***	0.202^***
	(0.0226)	(0.0481)	(0.0635)	(0.126)	(0.038)
$\begin{matrix} d_{c, i, t} \end{matrix}$	1.607^***	0.513^***	0.298^***	0.909^***	1.043^***
	(0.167)	(0.121)	(0.111)	(0.22)	(0.166)
$\begin{matrix} \ln (L Q_{nc, i, t}) \end{matrix}$	-0.00623^**	0.00225	0.0130^***	0.00167	-0.00046
	(0.00305)	(0.00321)	(0.00418)	(0.00847)	(0.0033)
$\begin{matrix} p \end{matrix}$	-0.00368	-0.00356	0.0107^**	0.0108	0.0136^*
	(0.00372)	(0.00467)	(0.00489)	(0.0146)	(0.00742)
$\begin{matrix} p \times \ln (L Q_{nc, i, t}) \end{matrix}$	-0.00097	0.00323^**	0.00262^*	-0.00253	-0.00121
	(0.00134)	(0.00134)	(0.00142)	(0.00557)	(0.00238)
$\begin{matrix} d_{c, i, t} \times \ln (L Q_{nc, i, t}) \end{matrix}$	0.0188^***	0.00277	-0.0116^***	0.00871	0.00805^*
	(0.00576)	(0.00428)	(0.00439)	(0.0106)	(0.00411)
样本	58558	45981	23055	2791	18100
R²	0.083	0.08	0.147	0.241	0.127