We employ a three-stage game model with cost-reducing research and development (R&D) that is subject to spillovers to consider the problem of excess entry under free-entry equilibrium relative to the social optimum. Firms choose to enter or exit a market in the first stage, choose R&D in the...

Based on U.S. data for the 48-year-period 1953-2000, this study makes a contribution on the R&D-growth relation along five dimensions. First, we note several descriptive patterns that may be regarded as stylized facts relative to R&D outlays in the U.S. during the half-century period. These...