Free Sample Variable (SAMPLE). SAMPLE indicates if a respondent reported the person received a free sample of the prescription medicine in the round (0 = NO, 1 = YES). Respondents were asked in each round whether or not the person received any free samples of a reported prescribed medicine during the round. However, respondents were not asked to report the number of free samples a person received, nor was it made clear that free samples were included in the count of the number of times that the respondent reported a person purchasing or otherwise obtaining the prescribed medicine during the round. It is important for analysts to note that SAMPLE is not a count variable of free samples; SAMPLE = 1 indicates that a person was reported getting a free sample of the prescribed medicine during the round. This flag variable simply allows individual analysts to determine for themselves how free samples should be handled in their analysis.