segmentation) shaped the underlying incen- tives for innovation in the PC industry during the mid to late 1980s …

mix much akin to the theory of optimal portfolio composition. It is the job of a firm's marketing department to put …

Firms spend substantial resources on marketing and selling. Interpreting this as evidence of frictions in product …

I develop a new theory of marketing costs and introduce it into a model of trade with product differentiation and firm …

process innovation. There are strong reasons why an efficient economy ought to concentrate both job creation and destruction …

frontier? This paper models agents growing as a result of investments in innovation and imitation. Imitation facilitates …

paper, we address this question by investigating how innovation responses to a substantial policy initiative increasing … product market competition interact with the strength of patent rights. We provide empirical evidence of innovation responding … with step-by-step innovation models predicting that product market competition enhances innovation and, more importantly …

innovation distinguishing between "dirty" (internal combustion engine) and "clean" (e.g. electric and hybrid) patents across 80 … tax-inclusive fuel prices. Furthermore, there is path dependence in the type of innovation both from aggregate spillovers … and from the firm's own innovation history. Using our model we simulate the increases in carbon taxes needed to allow …