We study the optimal control of a pollutant that accumulates with a delay.We find that optimal paths are, in general, non-monotonic and oscillatory, but monotonic if the objective function is additively separable. Hence, using additively separable objective functions as an approximation to a...

The genuine savings criterion and the value of population in an economy with endogenous fertility rate / Kenneth J. Arrow, Alain Bensoussan, Qi Feng, and Suresh P. Sethi -- Continuous time overlapping generations models / Hippolyte d'Albis and Emmanuelle Augeraud-Véron -- Modeling technological...