Labor's share of income has attracted interest in recent years reflecting its apparent decline. These falls, witnessed across many countries, are usually deemed undesirable. Any such assertion, however, begs the question of what is the socially optimal labor share. We address this question using...

We introduce fertility choice into an R&D-based semi-endogenous growth model so that the economy's long-run growth rate is again fully endogenously determined. The ultimate growth engine is located in the population equation of the model ("people reproduce in proportion to their number"), and...

We derive an R&D-based semi-endogenous growth model where technological progressdepends on the available amount of technological opportunity. Incremental innovationsprovide direct increases in the knowledge stock but they reduce technological opportunityand thus the potential for further...