Eichel said the “guts” of the survey was an open-ended question that allowed the 1,000 respondents, who were targeted in late 2018 based on change-of-address information from the U.S. Postal Service, to write as little or as much as they’d like about why they moved out of the city. Many indicated more than one reason. Then, respondents were presented with 13 reasons why people might leave Philadelphia and were asked to rate whether those factored into why they moved, and whether they were a major or a minor reason.