Sample size: planned number of observations
We will recruit roughly 500 survey participants whose real profiles will be used to contact the subjects. We will contact approximately 20 listings for each survey participant. To reach our target of 3,500 sent messages, we will need to use 175 profiles (35% of participants). The excess profiles (beyond the minimum of 175) give us flexibility to choose profiles that are demographically balanced by gender and age, have occupations in our experimental set, and have common names. This allows us to avoid introducing confounds with individual occupation in our analysis.