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Some governments impose various regulations on businesses in their countries. Sometimes these regulations discourage foreign companies from entering home markets. In some countries all international businesses must have local partners. In other countries a foreign firm must have at least one native in the top management of a branch or a subsidiary. Some governments, foe example in Mexico, insist that the local partners have the controlling interest. However, big firms like IBM refuse to do business on these grounds and usually manage to find the way out.