User:Issa Rice

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Questions

• How do we measure growth? How do we know what's growing?
  • How is GDP calculated?
    • What choices/judgment calls are made in the calculation?
      • What's up with all these price indices/PPP formulas/aggregation methods?
      • Basket construction
      • Validation
    • Can we trust these GDP calculations?

Growth models

Model name	Endogenous variables	Exogenous variables	Constants	Year introduced
Harrod–Domar				1939
Solow–Swan				1956
AK
Leontief input–output
Feldman–Mahalanobis
Becker–Barro				1981, 1989
Ramsey–Cass–Koopmans
Romer				1990?
Schumpeterian
Product-variety
Semi-endogenous (Jones)

Production function name	Models that use this production function
Cobb–Douglas	Solow–Swan
Leontief

Probably for each model, a table like this:

Name	Variable	Unit	Rival input?	Endogenous?	Notes
Output	Y		–	Yes
Physical capital (capital stock)	K		Yes	In Solow–Swan	Physical capital includes things like machines, computers, buildings, etc.
Labor	L		Yes	Exogenous in Solow–Swan
Technology (knowledge)	A, T		No	Not in Solow–Swan
Consumption	C
Investment	I
Amount saved	S
Growth of X	$g_{X}={\dot {X}}/X={\frac {\frac {\partial X}{\partial t}}{X}}$
Population growth	$n={\dot {L}}/L$
Depreciation (rate?)	δ, d, D
Capital per worker	k = K/L			In Solow–Swan
Fraction saved	s
Output per worker	y = Y/L			Yes
Time	t
Production function	F
	α