*2.4. Survey Procedure*

The survey took place within two days in March 2019 and was administered in paper format via a face-to-face interview method. The interviews of the vendor group were conducted in the first day, and the second day was for the non-vendor group, by selecting randomly among night-market clients, ensuring the non-vendor sample had equal representatives of men and women and all age groups, like the vendor respondents. In total, 103 night-market vendors and 102 non-night-market vendors were surveyed, providing a total size of 205 respondents. A group of 10 assistants coming from Surin University administered the surveys, supervised by the author. The survey was administered in the Thai language, and each interview took around 10–15 min.
