Prostitution: Policy Options for Reform

Prostitution is illegal in the United States and most countries around the world but this hasn't caused the market for sex to disappear. Instead, like in any black market, criminalization drives the industry underground where contracts can't be enforced and the parties involved have few means to ensure their safety. Perhaps the primary concern should be making sure the workers and customers are protected. In that case, what can we learn about the experiences of different developed countries to see what the ideal policies are for America?