This document provides an overview of the theory of privatization. It defines privatization broadly as restricting the government's role and promoting free market policies. Specifically, it discusses various privatization methods like denationalization (selling state-owned assets), contracting-out services, franchising, deregulation, user fees, grants, vouchers, management contracts, and leasing. It also outlines advantages and disadvantages of these methods and barriers to privatization in developing countries like political/economic instability and underdeveloped capital markets.