The move this month by New Jersey regulators to deny a license to Columbia Sussex to operate the Tropicana casino in Atlantic City is both a stark reminder of the unique demands of the casino business and a cautionary tale for newer entrants. Perhaps more significantly, it's the latest example of how New Jersey's regulatory system differs markedly from Nevada's, which is closer to a free market system than any other gaming jurisdiction's and is generally reluctant to pull licenses from Nevada operators.