United Kingdom – private (licensed) entities are allowed to offer gambling
In the United Kingdom, online gambling is legal and regulated. Private organizers are allowed to offer gambling, provided that they have a UK gambling license or are licensed by one of the non-UK jurisdictions on the Gambling Commission’s “white list”.
According to the “British Gambling Prevalence Survey 2007”, conducted by the United Kingdom Gambling Commission, approximately 0.6 percent of the adult population had problem gambling issues (online, offline or both). This was the same percentage as in 1999, when real-money online gambling was still exceedingly rare. Therefore, it doesn’t seem like the country’s legalization of online gambling has led to an increase in problem gambling.
Worthy of mentioning is that the 2007 study found the highest prevalence of problem gambling issues among sports bettors, those playing fixed odds betting terminals and those gambling at betting exchanges. Fixed odds betting terminals are gambling machines located in betting shops in the UK, where you can play games such as roulette, slots, and bingo, and bet on simulated horse- and greyhound races.
Norway – state monopoly on gambling
In Norway, there is a state monopoly on both online and offline gambling.
The Norwegian SINTEF study of December 2007 showed that the prevalence of problem gaming for both online and offline gambling was 0.7% This was the same percentage as in 2002.
I seems like the Norwegian state monopoly has not managed to reduce the prevalence of problem gaming below that of the United Kingdom.
In Norway, the typical gambler with problem gambling issues would wager on gambling machines. The two next most likely games of choice were scratch tickets and “tipping” (parimutuel sports betting).
United States – the law varies from state to state
In the United States, each state have the mandate to enact its own gambling law, and that is also the case for areas managed by a Native American tribe under the US Bureau of Indian Affairs.
There are also federal laws in place regarding certain types of gambling, especially sports betting and online gambling.
Studies commissioned by the National Gambling Impact Study Commission Act has show the prevalence of pathological gamblers in the United States ranges from 0.1 percent to 0.6 percent*, while the prevalence of problem gamblers was 2.3 percent in 2008.
*National Opinion Research Center (April 1, 1999). “The Prevalence and Correlates of Gambling Problems Among Adults”. Gambling Impact and Behavior Study. National Gambling Impact Study Commission. p. 25.