This folder contains two csv files. GAdata.csv contains per-subject/ per-period data on decisions made by participants in all our sessions. Interaction_Data.csv contains data aggregated by interactions. E.g., fraction of periods during which an interaction cooperated.
This data set contains one data point for each choice made by every subject that participated in the experiment.
- Session: session ID, from 1 to 16.
- Subject: session-specific subject ID, from 1 to 24 in most sessions.
- GovStructure: governance structure of the alliance. Four possible values:
- 2-player: two players, no exit cost.
- 3-player: three players, no exit cost.
- 2-Exit cost: two players, exit cost.
- 3-Exit cost: three players, exit cost.
- Game: the strategic properties of the alliance game played. Either CG, for coordination game, or PD, for prisoner's dilemma.
- interactionDraw: the number of periods per interaction was randomly drawn in the first two sessions, and replicated afterwards. There are thus two types of ``interaction draws''. Type 1 has seven interactions, lasting 5, 14, 5, 11, 6, 12, and 37 periods each. Type 2 has six interactions, lasting 19, 4, 2, 15, 20, and 21 periods each.
- interaction: session-specific interaction ID. For type 1 interaction draw, the ID goes from 1 to 7, for type 2 interaction draw it goes from 1 to 5.
- Period: interaction-specific period ID, ranging from 1-2 in the shortest interaction, to 1-37 in the longest interaction.
- Partnership: alliance ID. In each interaction of a session, two or three subjects interact repeatedly. Partnership is the interaction-specific ID of the group interacting repeatedly.
- Profit: profit obtained by the given subject in the current interaction and period.
- Matchpay: cumulative profit obtained by the given subject in the current interaction up to the current period.
- Finished: if equal to 0, the current alliance has not been terminated by a partner exiting. Is larger than 0, the current alliance has been terminated in the specified period by a partner exiting.
- Choice: action chosen by the subject in the current interaction and period. Five possible values: C means the subject contributes resources to the alliance, nC means the subject does not contribute resources to the alliance, E means the subject chooses to exit the alliance, E- means the subject or one of her partners chose to exit the alliance in a preceding period.
- Terminator: a dummy that takes on the value of 1 if the alliance was terminated by the subject's choice to exit in the current or some preceding period. If, instead, the alliance has not been terminated, or it was terminated by a partner's choice to exit, the dummy equals 0.
- PartnerChoice.Poc: choice of the single partner in two-player alliances. Choice of ``partner one'' in three-player alliances.
- PTc: empty for two-player alliances. Choice of ``partner two'' in three-player alliances.
- gplay: indicator of joint choice of all alliance partners.
It takes on 7 different values for two-player alliances: 1 if both choose C, 2 if the subject chooses C and her partner nC, 4 if the subject chooses nC and her partner C, 6 if both subjects choose nC, 7 if the subject chooses E, 8 if the subject's partner chooses 8, and 9 in all other cases.
It takes on 9 different values for three-player alliances: 1 if all players choose C, 2 if the subject and one partner choose C while another partner chooses nC, 3 if the subject chooses C and both partners choose nC, 4 if the subject chooses nC and both partners choose C, 5 if the subject and one partner choose nC while another partner chooses C, 6 if all three players choose nC, 7 if the subject chooses E, 8 if a partner chooses E, 9 in all other cases. - simplay: indicator of joint choice of all partners, treats partners symmetrically.
For two-player alliances, the values are: 1 if both choose C, 2 if one partner chooses C and the other nC, 4 if both choose nC, 5 if one partner chooses E, 6 if E was chosen in some preceding period.
For three-player alliances, the values are: 1 if all partners choose C, 2 if two partners choose C and one partner chooses nC, 3 if two partners choose nC and one partner chooses C, 4 if all partners choose nC, 5 if one partner chooses E, 6 if E was chosen in some preceding period. - Age: age of the subject, as collected from the exit questionnaire.
- Gender: gender of the subject, as collected from the exit questionnaire.
This data set contains one data point for each interaction formed by sets of two or three subjects during all sessions of the experiment.
- Session: session ID, from 1 to 16
- interaction: session-specific interaction ID. For type 1 interaction draw, the ID goes from 1 to 7, for type 2 interaction draw it goes from 1 to 5.
- Partnership: alliance ID. In each interaction of a session, two or three subjects interact repeatedly. Partnership is the interaction-specific ID of the group interacting repeatedly.
- gstruct: governance structure of the alliance. Four possible values:
- 2-player: two players, no exit cost.
- 3-player: three players, no exit cost.
- 2-Exit cost: two players, exit cost.
- 3-Exit cost: three players, exit cost.
- game: the strategic properties of the alliance game played. Either CG, for coordination game, or PD, for prisoner's dilemma.
- it_type: the number of periods per interaction was randomly drawn in the first two sessions, and replicated afterwards. There are thus two types of ``interaction draws''. Type 1 has seven interactions, lasting 5, 14, 5, 11, 6, 12, and 37 periods each. Type 2 has six interactions, lasting 19, 4, 2, 15, 20, and 21 periods each.
- it_length: length, in periods, of the current interaction.
- fins: period in which the alliance was terminated because a partner chose E. If equal to 0, the alliance was never terminated.
- Ldum: a dummy, specified as a factor variable equal to "CC last period" if all partners chose C in the last period of the interaction, or "not CC last period" if not all partners chose C in the last period of the interaction.
- startC: conditional on all partners chosing C in the last period, startC gives the first period when C was chosen by all partners, to keep on being chosen until the final period of the interaction. startC = 0 means partners did not all choose C in the last period.
- cfreq: fraction of all periods of the interaction in which all partners jointly chose C.
- ncfreq: fraction of all periods of the interaction in which all partners jointly chose nC.
- fcdummy: dummy, equal to 1 if all partners chose C in all periods of the interaction.
- sdummy: dummy equal to 1 if an alliance is "successful", meaning that all partners choose C in all periods. Its value is 0 otherwise.
- tdummy: dummy, specified as a factor variable equal to "Terminated" if the alliance was terminated by a partner choosing E in some period, and "Never E" if no partner chose E in any period.
- simple: dummy, specified as a factor variable equal to "2-player" if the governance structure is 2-player, and "Other" otherwise.
- exitcost: dummy, specified as a factor variable equal to "2-Exit cost" if the governance structure is 2-Exit cost, and "Other" otherwise.
- multi: dummy, specified as a factor variable equal to "3-player" if the governance structure is 3-player, and "Other" otherwise.
- multec: dummy, specified as a factor variable equal to "3-Exit cost" if the governance structure is 3-Exit cost, and "Other" otherwise.