Table 7.

Treatment Effects Separately for “Friend” and “No Friend” Treatments

	Antibiotic prescription		Total drug expenditure in RMB		Number of drugs prescribed		Treatment Duration (min)		Physician responds politely after being thanked		Questions 10-18

	Friend	No- Frien d	Friend	No- Friend	Friend	No- Friend	Friend	No- Friend	Friend	No- Frien d	Frien d	No- Frien d

	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)
Role B	0.07	−0.07	−0.92	−2.01	−0.23	−0.25	−0.20	0.14	−0.10	0.10	−0.53	0.72
	[0.07]	[0.06]	[8.13]	[7.16]	[0.16]	[0.15]	[0.17]	[0.18]	[0.09]	[0.10]	[0.48]	[0.51]
Role A ^* Gift	- 0.15^**	- 0.12^*	- 20.76^**	- 20.72^**	- 0.65^**	- 0.57^**	0.66^**	0.48^**	0.23^**	0.18^*	0.55	0.64
	[0.05]	[0.05]	[6.03]	[5.70]	[0.13]	[0.11]	[0.15]	[0.15]	[0.07]	[0.08]	[0.40]	[0.41]
Role B ^* Gift	−0.10	0.00	−13.57^*	−3.54	−0.23	−0.03	0.52^**	- 0.42^**	0.24^**	- 0.18^*	0.41	−0.43
	[0.05]	[0.05]	[5.83]	[5.92]	[0.12]	[0.11]	[0.14]	[0.13]	[0.08]	[0.08]	[0.36]	[0.41]
Constant	0.51	0.50	84.47^*	79.85^**	2.51^**	2.35^**	4.44^**	4.22^**	0.59	0.55	4.22^*	2.72
	[0.32]	[0.27]	[38.60]	[22.44]	[0.52]	[0.48]	[0.72]	[0.73]	[0.37]	[0.32]	[1.86]	[1.63]
β3-β1	−0.17	0.07	−12.65	−1.53	0.00	0.22	0.72^**	−0.56^*	0.34^*	−0.28	0.94	−1.15
F Test β3–β1=0	2.69	0.53	1.19	0.02	0.00	1.07	7.54	4.45	5.84	3.53	1.74	2.29
P-value	0.10	0.47	0.28	0.89	0.98	0.30	0.01	0.04	0.02	0.06	0.19	0.13
Observations	320	320	320	320	320	320	320	320	320	320	320	320
R-squared	0.73	0.79	0.58	0.58	0.49	0.60	0.39	0.43	0.40	0.39	0.37	0.35

Visit Order	√	√	√	√	√	√	√	√	√	√	√	√
Patient fixed effects	√	√	√	√	√	√	√	√	√	√	√	√
Physician fixed effects	√	√	√	√	√	√	√	√	√	√	√	√

Note: Robust standard errors are in brackets with

^**

, representing estimates significant at 1% and 5% level, respectively.