This book identifies rent-seeking behaviour as one of the main causes of poor economic performance, observed, among other places, in many countries of Africa. Rent-seeking describes the abiUty to capture incomes without producing output or making a productive contribution. Since rent-seekers are often an integral part of an ailing economy and resist the adoption of reforms, understanding and anticipating rent-seeking behaviour is crucial for designing more adequate and effective policy reforms. Following a comprehensive theoretical elaboration of the causes, properties and consequences of rents and rent-seeking strategies in the context of economic reforms and development cooperation, this book presents a detailed case study on rent-seeking within the civil service, parastatal sector and business com munity. It demonstrates how rent-seekers in Tanzania have systematically delayed or undermined reforms such as tax reforms, trade liberaHsation, privatisation or any reforms that aim to restrain corruption and embezzlement. The case study quantifies and evaluates the rent-seeking behaviour of more than 300 parastatal companies, considering their profits and losses, the quality and timeliness of their accounting and the magnitude of support they obtained from 16 different sources.