Managing Growth in Miniature explores the history of the way economists think about growth. It focuses on the period between the 1930s and 1960s, tracing the development of the famed 'Solow growth model,' one of the central mathematical models in postwar economics. It argues that models are not simply 'efficient tools' providing answers to the problems of economic theory and governance. The Solow model's various uses and interpretations related not only to the ways it made things (in)visible, excluded questions, and suggested actions. Its 'success' and effects ultimately also pertained to its fundamental ambiguities. Attending to the concrete sides of economic abstractions, this book provides a richly layered and accessible account of the forms of knowledge that shaped the predominant notion of 'economic growth' and ideas of how to govern it.