This book is an attempt to present and understand the contemporary ideas lies be¬hind the different economic growth models both at graduate and postgraduate level. Infact this book serve two important purposes. Firstly, this book is mainly about the economic growth and long run economic development dynamics. The process of economic growth and the difference in economic performance across the different countries are the most important and challenging areas in social science of mod¬ern economic era. The students who has sound economic understanding can strive with this book, because only such understanding will enables a serious and thought provoking study of growth and development. Secondly in some different approach of presentation, this book has adopted the verbal methods of presenting the topics covered with extensive use of diagrams to illustrate the verbal explanation. Even mathematical proofs are explained wherever felt necessary to explain. The major object is to provide a modern text of the economics of development, growth models and planning for university students. Apart from its benefits to the Honours and Post Graduate students, it must be of immense value to various com¬petitive examinations like I.A.S.; I.E.S.; U.G.C. NET/JRF; C.A. M.B.A. etc AUTHOR INFO Prof. Udai Prakash Sinha: Former Vice Chancellor, Central University of Haryana and Professor & Head, Univ. Dept. of Economics, T.M. Bhagalpur University, Bhagalpur