In recent decades, competition law has also been sold as good medicine to provide better public services, traditionally funded by tax-payers and administered by democratically accountable governments. Hence competition law is closely connected with the law on deregulation of access to markets, providing state aids and subsidies, the privatisation of state-owned assets and the use of independent sector regulators, such as the United Kingdom telecommunications watchdog Ofcom. Behind the practice lies the theory, which over the last fifty years has been dominated by neo-classical economics. Markets are seen as the most efficient method of allocating resources, although sometimes they fail, and regulation becomes necessary to protect the ideal market model. Behind the theory lies the history, reaching back further than the Roman Empire. The business practices of market traders, guilds and governments have always been subject to scrutiny and sometimes to severe sanctions. Since the twentieth century, competition law has become global. The two largest, most organised and influential systems of competition regulation are United States antitrust law and European Community competition law. The respective national/international authorities, the U.S. Department of Justice (DOJ) and the Federal Trade Commission (FTC) in the United States and the European Commission's Competition Directorate General (DGCOMP) have formed international support- and enforcement-networks. Competition law is growing in importance every day, which warrants for its careful study.