Zenith, an American manufacturer of television sets, and National Union Electric Corporation (NUE), the successor company to an American television-manufacturing firm that had since withdrawn from the market, sued twenty-one Japanese-controlled corporations that manufactured or sold Consumer Electronic Products (CEP), claiming that these petitioners/defendants, over a twenty-year period, had legally conspired to drive American firms from the American CEP market by engaging in a scheme to fix and maintain artificially high prices for television sets sold by the petitioners in Japan, while simultaneously maintaining low prices for sets exported to and sold in the United States. The respondents claimed that such activity was concerted action in violation of Section 1 of the Sherman Act. Is there a restraint of trade in this situation? Explain.