Effects of Proactive Call to Customers of Norsk Rikstoto (Horse Gambling Operator in Norway): A Randomized Controlled Study

Customers/gamblers gambling at Norsk Rikstoto (gambling monopolist in Norway providing horse gambling products with potential gambling problems will be randomly allocated to receive a proactive phone call (encouraging them to change their gambling behavior - e.g., be lowering the loss limit) or to a control condition. Outcomes will be short and long terms registered gambling behavior.