There is need to understand the sources of public expenditure growth and the quality of public expenditures, to determine whether they directly contribute to economic growth. This book is a doctoral thesis that investigates the causal relationship between aggregate public expenditure and its compositions on economic growth for the Nigeria case over the period of 1979-2008. The book makes significant controbitions for fiscal and public financial management reforms, particlarly for developing and emerging economies that are designing their public expenditure management framework. This is recommended for Public finance policy makers, the executive and legislative organs of government, researchers, academics, and students of public financial management.