Table 5.

Parameter estimates

Independent variable	(1)	(2)	(3)
Constant	− 0.579 (− 2.070)**	− 0.775 (− 3.980)***	− 0.891 (− 3.27)***
PV		0.649 (12.100)***	0.489 (6.360)***
PT		0.308 (5.390)***	0.505 (6.410)***
Title	0.074 (1.160)	− 0.304 (− 0.680)	− 0.017 (− 0.380)
Number	0.330 (3.300)	0.073 (1.030)	0.059 (0.850)
Rate	0.995 (11.500)***	0.322 (4.620)***	0.295 (4.29)***
Risk	− 0.154 (− 1.410)	− 0.082 (− 1.000)	0.127 (0.420)
Risk*PV			0.336 (3.270)***
Risk*PT			− 0.389 (− 3.650)***
Observation	339	339	339
Adj R-squared	0.483	0.753	0.762
F	79.910	172.930	136.200

t statistics in parentheses

^**p < 0.05; *** p < 0.01