from otree.api import * c = cu doc = '' class C(BaseConstants): NAME_IN_URL = 'my_public_goods' PLAYERS_PER_GROUP = 3 NUM_ROUNDS = 1 ENDOWMENT = 1000 MULTIPLIER = 2 class Subsession(BaseSubsession): pass class Group(BaseGroup): total_contribution = models.CurrencyField() individual_share = models.CurrencyField() def set_payoffs(group: Group): players = group.get_players() contributions = [p.contribution for p in players] group.total_contribution = sum(contributions) group.individual_share = group.total_contribution * C.MULTIPLIER / C.PLAYERS_PER_GROUP for player in players: player.payoff = C.ENDOWMENT - player.contribution + group.individual_share class Player(BasePlayer): contribution = models.IntegerField(label='How much will you contribute?', max=C.ENDOWMENT, min=0) class Contribute(Page): form_model = 'player' form_fields = ['contribution'] class ResultsWaitPage(WaitPage): after_all_players_arrive = set_payoffs class Results(Page): form_model = 'player' page_sequence = [Contribute, ResultsWaitPage, Results]