Impact of Labour Productivity Differences on Urban-Rural Integration Development and Its Spatial Effect: Evidence from a Spatial Durbin Model

Table 3

Descriptive statistics of observation samples.

Variable	Sample size	Average value	Standard deviation	Minimum value	Maximum value
ln (DOURI)	143	−1.018	0.461	−2.103	−0.224
ln (LPD)	143	−1.584	0.368	−2.68	−0.483
ln (STP)	143	1.903	1.195	−0.81	4.104
ln (OUL)	143	5.719	2.136	1.613	9.506
ln (AIL)	143	−2.845	0.311	−3.492	−1.723