During the next decade, the Korean government became more liberal in its economic policies. Small private companies were encouraged, protectionist import restrictions were loosened, and the government reduced positive discrimination (affirmative action), to encourage free market trade and to force the chaebol to be more aggressive abroad. Daewoo responded by establishing a number of joint ventures with U.S. and European companies. It expanded exports of machine tools, defense products (under the S&T Daewoo company), aerospace interests, and semiconductor design and manufacturing. Eventually, it began to build civilian helicopters and airplanes, priced considerably cheaper than those produced by its U.S. counterparts. It also expanded efforts in the automotive industry and was ranked as the seventh largest car exporter and the sixth largest car manufacturer in the world. Throughout this period, Daewoo experienced great success at turning around faltering companies in South Korea.