We propose an adaptation of Hartwick's investment rule to models with population growth and show that following Hartwick's rule is equivalent to a time-invariant real per capita net national product. In the so-called DHSS model of capital accumulation and resource depletion the proposed...

Population growth has two potentially counteracting effects on pollution emissions:(i) more people implies more production and thereby more emissions, and (ii) more people implies a larger research capacity which might reduce the emission intensity of production, depending on the direction of...