Sample size (or number of clusters) by treatment arms
Refugees. With the collaboration of refugee leaders and refugee-led organizations, we composed a database of 1,088 skilled refugees who were (i) job seekers, (ii) were not looking for jobs but were interested in applying to one if possible, or (iii) were not in permanent employment. We set an appointment and approached the respondents with two messages: first, to ask some questions regarding their skills and work experience; and second, to explain what the research program was and get consent for it.
The listing was conducted between February and April 2021. From this list, 1,019 refugees agreed to be registered for the program. The first part of the program took place between April 19th and April 24th and consisted of testing refugees on their skills. A final number of 537 refugee workers successfully passed the test of skills. After the skills testing, refugees were invited to participate in the baseline and reminded that some could receive a one-week of internship offer. For our final sample, we had to drop out refugees that never found a match (N=126).\footnote{That is, firms in the sample of \cite{loiaconosilvamatch} were not interested in hiring these refugees} Furthermore, we had an attrition at endline of 24 refugees. Our final sample is composed by 377 refugee workers.
Local workers: In June 2021, we conducted a listing survey with firms in Kampala, active in sectors that match the occupations of refugee workers. Using the Uganda Census of Establishment Data 2010, the team of enumerators was assigned to different parishes daily and was instructed to interview all the firms that fell within a sector of interest. Enumerators were instructed to (i) look for the owner, the manager, or any employee with faculty to make managerial decisions; and (ii) the owner must be a Ugandan national.
Due to a second wave of COVID-19 in the country, the activities stopped and resumed between September-October 2021, when new firms were recruited. A total of 1,196 firms were recruited but only 536 were willing to hire a refugee. To select local workers, the sampling procedure was: (i) if the firm had only one worker, we interviewed that worker; (ii) if the firm had more than one worker, we asked the owner or manager of the firm which workers were most likely to work in close contact with a new employee.
Since not all the firms in the sample had at least one worker, our final sample of local workers is 273. These are the workers present at baseline and endline. If the worker changed between the two surveys, we kept the baseline answers of the baseline worker, but use the endline replies of the new worker. For this reason, our results are representative of all local workers in the firm, and not of the individual local worker.