On August 5, 2013, "The Guardian" revealed that 90 percent of McDonald's UK workforce are on zero-hour contracts, making it possibly the largest such private sector employer in the country. In April 2017, due to employee strikes, they gave all employees the option of fixed contracts instead. A study released by Fast Food Forward conducted by Anzalone Liszt Grove Research showed that approximately 84 percent of all fast food employees working in New York City in April 2013 had been paid less than their legal wages by their employers.