Yetkiner, I. Hakan; Vaal, Albert de; Zon, Adriaan van - Forschungsstelle Nachhaltige Umweltentwicklung (ZMK), … - 2003
Drastic technological changes are cyclical because basic R&D is carried on only at times when entrepreneurial profits … good is produced by a set of intermediaries, outgrowths of basic R&D and applied R&D. The basic intermediate, product of … basic R&D, is modeled as in Romer (1990). Complementary intermediates, the outgrowths of applied R&D, do show the property …