We provide an extensive comparison of the R&D models of d'Aspremont-Jacquemin (1988) and Kamien-Muller-Zang (1992), exposing full or partial conflict in key conclusions and policy prescriptions. Using three separate formal and/or intuitive criteria, we argue that the first model is invalid for...

In his response to Closure in Cole's Reformulated Leontief Model (Jackson et al. 1997) Cole presents the mechanics of his solution. His spreadsheet demonstration of the model, however, fails to fully address the conceptual issues and model specification concerns raised in our critique. His...