Many nations implement competition laws, and there is general agreement on acceptable standards of behavior. The degree to which countries enforce their competition policy does vary substantially, with the United States generally regarded as having the most strict competition laws and enforcement.[citation needed]
Competition regulators may also regulate certain aspects of mergers and acquisitions and business alliances and regulate or prohibit cartels and monopolies. Other government agencies may have responsibilities in relation to aspects of competition law which affect companies (eg. the registrar of companies).