During the last decades, gambling excessively for money has been increasingly recognized as a problem (often referred to as "problem gambling", “gambling disorder” or "pathological gambling") in most parts of the world, especially in countries where the opportunities to gamble have expanded on the internet. At the same time, the ability to control domestic gambling through legislation, tax rules and other measures has decreased. With growing availability, there has also been an increasing need to understand the ensuing individual and social impacts of gambling.