The researchers compared the gambling behaviours of casino staff and local residents in Macau in the past year and when they first started casino gambling. They determined if the exposure or adaptation hypothesis explained the participants’ responses to gambling opportunities. 230 casino staff and 169 Macau residents completed a survey either online or in face-to-face interviews. The survey results suggested that many participants gambled at the same frequency or less often than before. Also, casino staff gambled less than Macau residents. Thus, working in a casino in Macau does not make people more likely to have gambling problems. The adaptation hypothesis explains how people in Macau respond to gambling opportunities.