For much of the latter half of the twentieth century, the provision of telecommunications services in developing countries was the responsibility of the state. Penetration rates were low, service quality was poor, and the incumbent operator was often unprofitable. Government attempts at improvement focused on securing investment, technical assistance, and financial support. Commencing in the late 1990s, the telecommunications sector in much of the developing world underwent a profound and lasting transformation: governments established new regulatory regimes and institutions, corporatized and privatized their state-owned telecommunications operations, and liberalized markets as part of wide-ranging sector reforms.