The laboratory experiment will be programmed in oTree (Chen et al. 2016) and conducted with participants of the University of Hamburg. Participants will read the instructions on screen and are requested to answer control questions before proceeding with the experiment.
Participants play 10 rounds (1 round in treatment one shot) of the game under a complete stranger matching in groups of two. Participants are informed of the matching procedure in the instructions. In each round, participants have to decide between strategy X or Y. After each round, participants receive feedback.
Additionally, in treatment ‘repeated partner’, participants play 10 rounds of the game under a partner matching in groups of two. Participants are informed of the matching procedure in the instructions. In each round, participants have to decide between strategy X or Y. After each round, participants receive feedback.
Before each round, participants are asked to state their belief what strategy choice (X or Y) the other player in this round will make. This belief request is unincentivised.
In the post-experimental questionnaire, we ask participants for:
• gender, age, field of study,
• risk, courtesy and patience attitudes,
• motives (payoff maximization, altruism, inequality aversion, efficiency or envy) behind their decisions in the experiment.
Further design details:
• Complete Stranger Matching
• Partner Matching
• On an individual level, the display of strategies in the payoff matrix (XY or YX) is randomized between subjects.
• Feedback after each round: Own strategy choice, strategy choice of the other player, own payoff for the respective round, payoff of the other player for the respective round
• Feedback at the end of the experiment: Own accumulated payoff