The obstacles to forming a union have only grown in recent decades. Around 27 states have passed "Right to Work" laws, which make forming a union more difficult in states with those laws and provide a refuge for companies looking to escape unions in states without those laws. Globalization, likewise, has given companies the option to close-up shop and move overseas. Automation has given companies the option to replace their workers with machines. Deregulation has increased industry competition and weakened unions' ability to extract concessions from monopolistic companies. Various changes to labor law, by the U.S. Congress, by state legislatures, and by the federal courts, have made it harder for unions to grow and thrive. Corporations now spend millions and millions on highly paid consultants, developing effective tactics to suppress unionizing efforts and pressure their workers into submission. Even once workers form a union, it now takes an average of 465 days for the union to sign a contract with their employer.