Over the last several years, various interest groups have pushed for a $15 minimum wage, sometimes referred to as a "living wage." One criticism of a national $15 wage (aside from the usual problems of a binding minimum wage) is that the cost of living in cities in the United States is significantly different. A $15 wage in Cheyenne, Wyoming, goes much further than a $15 wage in Seattle, Washington. A second criticism of the the $15 living wage is that it is not clear what a "living wage" means. Economists at MIT have "developed a living wage calculator to estimate the cost of living in your community or region based on typical expenses. The tool helps individuals, communities, and employers determine a local wage rate that allows residents to meet minimum standards of living