LBabcock et al/J.of Economic Behavior Org.27(1995)475-485 481 Small,Certain Small,Uncertain Large,Certain arge,Uncertain 59% 596 Fig.1.Histograms by conditions received.The main effects of contract zone size and information and the interac tion between them are used as independent variables.Large is a dummy variable for large contract zone,certainty is a dummy variable for the certainty condition The results show no significant main effect for contract zone size (p=0.207) for the first regression,but a significant effect for the second regression (p< Table 2 Men and time by condition,all bargaining pairs Certainty Uncertainty contract zone 1U7.5· 329.3b (19.2) 37.4) Large contract zone 150 274.6 (25.0) 35.9) Mediar tract zon 81.0 336.0 Large contract zone 1275 264.0 The umber of bargaining pairs in.0.0.19 int are sigr ntly different from each other at the 0.01 level. L.. Babcock et al./ 1. of Economic Behavior & Org. 27 (199.5) 475-485 481 Small, Certain Large, Certain .5 .4 1 6 596 Small, Uncertain Large, Uncertain Fig. 1. Histograms by conditions. received. The main effects of contract zone size and information and the interac￾tion between them are used as independent variables. Large is a dummy variable for large contract zone, certainty is a dummy variable for the certainty condition. The results show no significant main effect for contract zone size (p = 0.207) for the first regression, but a significant effect for the second regression (p < Table 2 Mean and median settlement time by condition, all bargaining pairs Mean Small contract zone Large contmct zone Median Small contract zone Large contract zone Certainty Uncertainty 107.5 a 329.3 b (19.2) (37.4) l5OP 274.6b (25.0) (35.9) 81.0 336.0 127.5 264.0 Standard errors are in parentheses. The number of bargaining pairs in each condition is 21. 20, 20, 19 (SC, LC, SU, LU). Means which do not share a common subscript are significantly different from each other at the 0.01 level