Appendix Table 2.

Treatment Effects Separately by Doctor Age

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

	Docto r Young	Doctor Old	Doctor Young	Doctor Old	Doctor Young	Doctor Old	Docto r Young	Docto r Old	Docto r Young	Docto r Old	Docto r Young	Docto r Old

	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)
Role B	0.05	−0.07	−2.46	−3.01	−0.20	−0.32*	−0.16	−0.04	−0.09	0.01	−0.22	0.07
	[0.07]	[0.07]	[8.50]	[6.62]	[0.17]	[0.13]	[0.20]	[0.15]	[0.10]	[0.09]	[0.56]	[0.43]
Role A ^* Gift	−0.10^*	- 0.19^**	- 19.97^**	- 18.18^**	- 0.50^**	- 0.63^**	0.47^**	0.57^**	0.10	0.26^**	0.62	0.57
	[0.05]	[0.05]	[6.40]	[5.55]	[0.13]	[0.12]	[0.17]	[0.13]	[0.09]	[0.07]	[0.48]	[0.35]
Role B ^* Gift	−0.08	−0.02	−9.37	−2.61	−0.10	−0.04	−0.44^*	−0.07	−0.22	−0.04	−0.45	0.38
	[0.06]	[0.07]	[8.68]	[7.06]	[0.17]	[0.13]	[0.21]	[0.16]	[0.12]	[0.10]	[0.65]	[0.50]
Role B ^* Gift ^* Friend	0.02	−0.05	−4.34	−11.28	−0.01	−0.21	0.79^**	0.46^*	0.44^**	0.18	0.61	−0.50
	[0.07]	[0.08]	[10.38]	[8.60]	[0.22]	[0.17]	[0.28]	[0.20]	[0.15]	[0.12]	[0.77]	[0.60]
Constant	0.02	0.66^*	50.40^*	70.85^**	1.89^**	2.54^**	5.20^**	4.42^**	1.09^**	0.79^*	4.17^**	4.05^*
	[0.10]	[0.26]	[20.31]	[19.44]	[0.72]	[0.48]	[0.75]	[0.64]	[0.21]	[0.33]	[1.23]	[1.78]
β3+β7	−0.07	−0.08	−13.71	−13.88^*	−0.11	−0.25	0.35	0.39^*	0.21	0.14	0.16	−0.12
F Test β3+β7=0	0.92	1.50	2.51	4.12	0.31	3.36	2.30	5.82	3.57	2.55	0.07	0.07
P value	0.34	0.22	0.12	0.04	0.58	0.07	0.13	0.02	0.06	0.11	0.79	0.79
Observations	244	396	244	396	244	396	244	396	244	396	244	396
R-squared	0.84	0.68	0.61	0.57	0.59	0.52	0.50	0.39	0.48	0.37	0.44	0.32

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.