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Statistical analysis: there is a very serious problem with the statistics, as far as I can tell: it seems that the authors are not accounting for the fact that multiple observations from within one group are not independent. Either they can perform all of the analysis at the level of the group (ie just have one observation per group, which is the average of all decisions by all group members in all periods); or they can use regressions which standard errors clustered on group.

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sltmac: ½ð±Ò+1 2012-09-03 18:04:34
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sltmac: ½ð±Ò+1 2012-09-03 18:04:38
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sltmac: ½ð±Ò+1 2012-09-03 18:04:41
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