This study examined the relationship between alcohol environments and problem drinking, including excessive alcohol consumption, heavy episodic drinking, driving after drinking, and riding with a drinking driver.

The authors merged geo-coded individual-level data from the California Health Interview Survey and Los Angeles County Health Survey with alcohol license data from the California Department of Alcoholic Beverage Control, distinguishing off-sale retails from on-sale establishments and, among on-sales, eating places from bars and taverns as well as minor-unrestricted establishments from minor-restricted establishments (i.e., youth below age 21 not allowed on business premises). 

Certain types of alcohol retailers in neighborhoods were associated with problem drinking. Moratorium of new licenses based on number of licenses per capita at county level is not effective because only a subgroup of licenses matters, and alcohol is more available in terms of distance, travel time, or search costs in densely populated cities.