In the U.S., the various levels of government generally do not regulate the hours of the vast majority of retailers (though there are exceptions, such as the blue law), and with the main exception being shops licensed to sell spirits and other alcoholic beverages (for shopping hours, see alcohol sale hours by state) and car dealerships. Shopping hours vary widely based on management considerations and customer needs. Key variables are the size of the metropolitan area, the type of store, and the size of the store.