United States labor law sets the rights and duties for employees, labor unions, and employers in the United States. Labor law's basic aim is to remedy the "inequality of bargaining power" between employees and employers, especially employers "organized in the corporate or other forms of ownership association". Over the 20th century, federal law created a series of minimum social and economic rights, and often encouraged state laws to go beyond minimum to favor employees. The Fair Labor Standards Act of 1938 requires a federal minimum wage, currently $7.25 but higher in 28 states, and discourages unhealthy working weeks over 40 hours through time and a half overtime pay. There are no federal or state laws requiring paid holidays or family leave yet, but the Family and Medical Leave Act of 1