Induced population growth and induced technological progress: their interaction in the accelerating stage.

摘要: A simple model of Malthusian population growth combined with population‐induced technological progress generates accelerating growth. The may be relevant for a first stage in which natural resource limitations can overcome through progress; it is not applicable to later constraints are more resistant. Parameter values roughly inferred from historical experience. Exogenously rapid initially depresses income, perhaps up several centuries, then raises without limit. More desirable only when the social discount rate less than ratio parameters induced technical and static diminishing returns. Imposed fluctuations cause inverse movements incomes, so that very difficult detect empirically even 500 years.