from otree.api import * from shared_out import set_players_per_group, get_or_none doc = """ This is a one-period public goods game with 3 players. """ class Constants(BaseConstants): name_in_url = 'public_goods_with_tax' players_per_group = None num_rounds = 3 instructions_template = 'public_goods/instructions.html' # """Amount allocated to each player""" class Subsession(BaseSubsession): pass def creating_session(subsession: Subsession): set_players_per_group(subsession) def vars_for_admin_report(subsession: Subsession): contributions = [ p.contribution for p in subsession.get_players() if get_or_none(p, 'contribution') != None ] if contributions: return dict( avg_contribution=sum(contributions) / len(contributions), min_contribution=min(contributions), max_contribution=max(contributions), ) else: return dict( avg_contribution='(no data)', min_contribution='(no data)', max_contribution='(no data)', ) class Group(BaseGroup): total_contribution = models.CurrencyField() individual_share = models.CurrencyField() average_contribution = models.CurrencyField() average_income = models.CurrencyField() total_earnings = models.CurrencyField() class Player(BasePlayer): contribution = models.CurrencyField( min=0, doc="""The amount contributed by the player""", label="How much will you contribute to the project (from 0 to 100)?", ) income_before_tax = models.CurrencyField() tax = models.CurrencyField() def contribution_max(player: Player): session = player.session config = session.config return config['endowment'] def set_payoffs(group: Group): session = group.session config = session.config group.total_contribution = sum([p.contribution for p in group.get_players()]) group.average_contribution = group.total_contribution / config['players_per_group'] #Soviel wird im Schnitt beigetragen group.total_earnings = group.total_contribution * config['multiplier'] group.individual_share = ( group.total_contribution * config['multiplier'] / config['players_per_group'] ) group.average_income = config['endowment'] + (group.total_contribution / config['players_per_group']) for p in group.get_players(): p.income_before_tax = (config['endowment'] - p.contribution) + group.individual_share p.tax = p.income_before_tax - group.average_income p.payoff = group.average_income # p.tax = # if(p.income_before_tax >= group.average_income): # {p.income_before_tax-group.average_income} # else: # {group.average_income-p.income_before_tax} class Introduction(Page): pass class Contribute(Page): form_model = 'player' form_fields = ['contribution'] class ResultsWaitPage(WaitPage): after_all_players_arrive = set_payoffs body_text = "Waiting for other participants to contribute." class Results(Page): @staticmethod def vars_for_template(player: Player): group = player.group session = group.session return dict( total_earnings=group.total_contribution * session.config['multiplier'] ) page_sequence = [Introduction, Contribute, ResultsWaitPage, Results]