The
Solow–Swan model is an
exogenous growth model, an
economic model of long-run
economic growth set within the framework of
neoclassical economics. It attempts to explain long-run economic growth by looking at
capital accumulation, labor or
population growth, and increases in
productivity, commonly referred to as
technological progress. At its core it is a neoclassical aggregate production function, usually of a
Cobb–Douglas type, which enables the model “to make contact with
microeconomics”. The model was developed independently by
Robert Solow and
Trevor Swan in 1956, and superseded the
post-Keynesian Harrod–Domar model. Due to its particularly attractive mathematical characteristics, Solow–Swan proved to be a convenient starting point for various extensions. For instance, in 1965,
David Cass and
Tjalling Koopmans integrated
Frank Ramsey's analysis of consumer optimization, thereby endogenizing the
savings rate—see the
Ramsey–Cass–Koopmans model.