The book consists of a series of research papers written by some of the best known economists on development planning. The paper by Kendrick and Taylor is one of the first example of using optimal control method in planning development. The paper by Tendulkar is an extensive study of application of linear programming method on foreign trade sector planning. The papers by Weisskopf, Clark, Blitzer, Marglin are some of the classic examples of application of mathematical programming in development economics. There are several applications on agriculture, spatial and regional planning and on education and social sectors. The book is a treasure house for students interested in the techniques and applications of mathematical methods on the most crucial problems of developments.