Cozzi, GuidoGuidoCozzi2023-04-132023-04-132017-06https://www.alexandria.unisg.ch/handle/20.500.14171/10231110.1016/j.econlet.2017.03.027This paper shows that combining the semi-endogenous and the fully endogenous growth mechanisms with a general CES aggregator, either growth process can prevail in the balanced growth path depending on their degree of complementarity/substitutability. Policy-induced long-run economic switches to the fully endogenous steady state as the R&D employment ratio surpasses a positive threshold are possible if the two growth engines are gross substitutes.enjournal article