VARIABLES:

participant -> numbering of participants from 1 to 363 
sraq1 to sraq20 -> 20 items of the SRA scale
orderinsessionfield -> order in which participants leaved the room in the third session
conditionfield -> field situation faced (from 1 to 5 following the order presented in the paper)
contributionfield -> contribution made in field situation (with "yes" or "no" for helping or not in situations 1 and 2)
participantid -> participant id used in the lab
GroupDG1 -> group in which participants are in DG1
TypeDG1 -> participant’s type in DG1 (dictator if =1)
ProfitDG1 -> participant’s profit in DG1
SentDG1 -> amount sent by dictator in DG1
GroupDG2 -> group in which participants are in DG2
ProfitDG2 -> participant’s profit in DG2
TypeDG2 -> participant’s type in DG2 (dictator if =1)
SentDG2 -> amount sent by dictator in DG2
GroupUG1 -> group in which participants are in UG1
ProfitUG1 -> participant’s profit in UG1
TypeUG1 -> participant’s type in UG1 (sender if =1)
SentUG1 -> amount sent by sender in UG1
AcceptUG1 -> whether or not receiver accepts sender’s offer in UG1 (accepts if =1)
GroupUG2 -> group in which participants are in UG2
ProfitUG2 -> participant’s profit in UG2
TypeUG2 -> participant’s type in UG2 (all participants =2, all receivers)
AutoSentUG2 -> amount sent in UG2 (=3 for all participants)
AcceptReceivUG2 -> whether or not receiver accepts sender's offer in UG2 (accepts if =1)
GroupTG1 -> group in which participants are in TG1
ProfitTG1 -> participant’s profit in TG1
TypeTG1 -> participant’s type in TG1 (sender if =1)
SentTG1 -> amount sent by sender in TG1
ReceivedTG1 -> amount received by receiver in TG1 (=3*SentTG1)
SentBackTG1 -> amount returned to sender by receiver in TG1
GroupTG2 -> group in which participants are in TG2
ProfitTG2 -> participant’s profit in TG2
TypeTG2 -> participant’s type in TG2 (all participants =2, all receivers)
AutoSentTG2 -> amount sent by sender in TG2 (=4 for all participants)
AutoReceivedTG2 -> amount received by receiver in TG2 (=3*SentTG1)
SentBackTG2 -> amount returned to sender by receiver in TG2
GroupPG -> group in which participants are in PG
ProfitPG -> participant’s profit in PG
ContributionPG -> participant’s contribution in PG
SumCPG -> sum of group members’ contributions in PG


