Intermediaries in Trust: Indirect Reciprocity, Incentives, and Norms

Table 3

Summary statistics by rating. Average return proportion by rating (a) and rating distribution per treatment (b). AR stands for “alternating roles” and FR for “fixed roles.”

(a) Return proportion

Treatment	Negative	Neutral	Positive
No incentive AR	0.14	0.22	0.34
No incentive FR	0.13	0.15	0.14
Fixed incentive AR	0.08	0.16	0.24
Fixed incentive FR	0.11	0.09	0.17
A incentive AR	0.15	0.22	0.33
A incentive FR	0.18	0.16	0.28
B incentive AR	0.14	0.20	0.22
B incentive FR	0.19	0.15	0.18
All treatments	0.15	0.16	0.22

(b) Rating distribution

Treatment	Negative	Neutral	Positive
No incentive AR	0.42	0.22	0.36
No incentive FR	0.37	0.26	0.37
Fixed incentive AR	0.34	0.31	0.35
Fixed incentive FR	0.36	0.30	0.34
A incentive AR	0.41	0.25	0.35
A incentive FR	0.37	0.23	0.40
B incentive AR	0.33	0.29	0.38
B incentive FR	0.33	0.22	0.44
All treatments	0.36	0.26	0.38