117 lines
2.5 KiB
Python
117 lines
2.5 KiB
Python
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from otree.api import *
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doc = """
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One player decides how to divide a certain amount between himself and the other
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player.
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See: Kahneman, Daniel, Jack L. Knetsch, and Richard H. Thaler. "Fairness
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and the assumptions of economics." Journal of business (1986):
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S285-S300.
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"""
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class C(BaseConstants):
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NAME_IN_URL = 'dictator'
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PLAYERS_PER_GROUP = 2
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NUM_ROUNDS = 10
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# Initial amount allocated to the dictator
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ENDOWMENT = cu(100)
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class Subsession(BaseSubsession):
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pass
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class Group(BaseGroup):
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kept = models.CurrencyField(
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doc="""Amount dictator decided to keep for himself""",
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min=0,
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max=C.ENDOWMENT,
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label="I will keep",
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)
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class Player(BasePlayer):
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pass
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# FUNCTIONS
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def set_payoffs(group: Group):
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p1 = group.get_player_by_id(1)
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p2 = group.get_player_by_id(2)
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p1.payoff = group.kept
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p2.payoff = C.ENDOWMENT - group.kept
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p1.participant.vars['earning_1'] = p1.payoff
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p2.participant.vars['earning_1'] = p2.payoff
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def get_players(player: Player):
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participant_name = player.participant
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return dict(participant_name=participant_name)
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def vars_for_admin_report(subsession):
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all_offers = []
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for subsession in subsession.in_all_rounds():
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for group in subsession.get_groups():
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# Safely retrieve the value of group.kept
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kept_value = group.field_maybe_none('kept') or 0
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offer = C.ENDOWMENT - kept_value
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all_offers.append(offer)
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payoffs = sorted([p.payoff for p in subsession.get_players()])
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return dict(payoffs=payoffs, all_offers=all_offers)
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def js_vars(player: Player):
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group = player.group
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return dict(
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taken=group.kept,
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)
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# PAGES
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class Introduction(Page):
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pass
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class Offer(Page):
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form_model = 'group'
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form_fields = ['kept']
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@staticmethod
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def is_displayed(player: Player):
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return player.id_in_group == 1
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class ResultsWaitPage(WaitPage):
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after_all_players_arrive = set_payoffs
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class Results(Page):
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@staticmethod
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def vars_for_template(player: Player):
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group = player.group
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return dict(offer=C.ENDOWMENT - group.kept)
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@staticmethod
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def js_vars(player: Player):
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group = player.group
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return dict(
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taken=group.kept,
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)
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@staticmethod
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def vars_for_admin_report(subsession):
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payoffs = sorted([p.payoff for p in subsession.get_players()])
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return dict(payoffs=payoffs)
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page_sequence = [
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Introduction,
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Offer,
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ResultsWaitPage,
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Results
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]
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