Variables

Model 1

Model 2

Model 3

Model 4

Model 5

Model 6

Income level

0.658***

(0.049)

0.886*** (0.066)

0.767***

(0.068)

0.455***

(0.069)

0.216***

(0.056)

0.168*** (0.054)

Internet

0.0194*** (0.004)

0.015***

(0.004)

−0.012**

(0.004)

−0.02***

(0.003)

−0.022*** (0.054)

Price

−0.2***

(2.95)

−16.371*** (2.929)

30.753***

(2.526)

−125.05***

(3.688)

Logistics cost

−51.294*** (2.379)

0.917

(2.089)

−2.212

(1.946)

Bshare

−1.382 ***

(0.015)

−1.388*** (0.014)

SMpp

0.156*** (0.00284)

cons

7.346***

(0.098)

5.413*** (0.396)

6.358*** (0.414)

9.333***

(0.432)

10.405***

(0.365)

10.536 *** (0.339)

R²

0.009

0.011

0.014

0.037

0.315

0.407

R² change

0.001

0.003

0.023

0.278

0.092

F

182.922***

104.279***

89.053***

184.644***

1791.633***

2224.461***

F change

25.407***

57.99***

465.056***

7919.485***

3006.828***