This book follows the intellectual path of Franco Modigliani, Nobel Prize winner and one of the most influential Keynesian economists of the twentieth century, tracing his development and examining the impact of his research. The book begins with Modigliani’s early work as a young law student in 1930s Italy and traces his development through his emigration to the U.S., his introduction to Keynes’ General Theory at the New School for Social Research and his seminal 1944 article on Keynesian and classical economics. The book also discusses Modigliani’s pioneering theory of savings: the life-cycle hypothesis with Richard Brumberg, further developed with Albert Ando, his contributions to decision-making under uncertainty and, finally, Modigliani’s collaboration with the Federal Reserve Board for the building of its first macroeconometric model for the U.S. economy. The book argues that although Modigliani is placed amongst the most prominent Keynesian economists, if we look to his published works only, and with the exception of the 1944 article, his connections with Keynesian theory appears of secondary importance until the beginning of the 1960s when he joined MIT. Moreover, since then his contributions are much more on policy issues rather than theoretical ones. This is the first book to place Modigliani’s thought in its proper historical and intellectual context, showing how it related to wider economic concerns and possible policy solutions. It will be of interest to scholars in the history of economic thought, and especially post-war American Keynesian economics. Antonella Rancan is Associate Professor of Economics at the University of Molise, Italy. Franco Modigliani and Keynesian Economics