There has been a transformation in the management of the public sectors of advanced countries. The traditional model of public administration, which predominated for most of the twentieth century, has changed since the mid-1980s to a flexible, market-based form of public management. This is not simply a matter of reform or a minor change in management style, but a change in the role of government in society and the relationship between government and citizenry. Traditional public administration has been discredited theoretically and practically, and the adoption of new forms of public management means the emergence of a new paradigm in the public sector.