Experimental Design
In each round, there will be a pool of 4 green workers and 4 orange workers, along with the ability level of each worker, where one worker from each pool will be chosen at random (ability level hidden). High-ability workers are educated with certainty (ph = 1); Low ability workers are not educated with certainty (pl = 0); Medium ability workers are educated with a 90% chance or 10 % chance depending on the round (pm = 0.9 or 0.1). Participants will be given information about the education status of the selected workers from each pool, and then they will face a binary choice of choosing between hiring the green worker or the orange worker. Participants will be incentivized to choose the worker with a higher ability, based on their education status.
I will randomly assign participants into three main treatment groups: Baseline (B), Social Bayesian (SB), and Social Non-Bayesian (SNB), where baseline group subjects receive simple feedback (ability level of the worker they hired) after each round, SB group subjects additionally receive information about the choice of another study participant - we choose a subject whose actions are very close to Bayesian, and SNB group subjects receive information about the choice of another study participant - we choose a subject whose actions are consistent with conservatism. The main part of the experiment consists of 120 rounds in 5 parts. Besides the same 5 parts as other treatments, the Baseline group has a part 6 where participants are incentivized to write advice, which might be shown to participants in other treatments. It is important to note that the additional information for SB and SNB groups is given before the hiring decision is made, and subjects do not know whether the choices they observe are Bayesian or not; they will only know that it is the choice of another participant (fixed across the rounds). Before the last 20 rounds, subjects in treatment groups SB and SNB will additionally read the recommendation from a Bayesian or Non-Bayesian subject, respectively, together with the written explanation for given advice.
It is possible that exposure to others' choices have no influence on subjects' decisions. This could be due to the fact that subjects do not recognize the optimality of the choices others have made, or that even though they do recognize the optimality of others' choices, they simply do not want to replicate others' decisions. To investigate different underlying mechanisms, I might run two additional treatment groups: Social Bayesian Feedback (SBF) and Social Non-Bayesian Feedback (SNBF). These two groups are given the same information as the SB and SNB groups, respectively, but they are also given feedback corresponding to the ability of the worker they did not hire.