We study a two sector endogenous growth model with environmental quality with two goods and two factors of production, one clean and one dirty. Technological change creates clean or dirty innovations. We compare the laissez-faire equilibrium and the social optimum and study first- and...

Patients with rare diseases, as well as their caregivers, sometimes develop new solutions to deal with their health conditions but only a small fraction share the solution with their doctor or other health professionals. When the value of patient developed solutions is considered, the evidence...

This article argues that the conceptual development of product innovation models goes hand in hand with paradigmatic changes in the field of organization science. Remarkable similarities in the change of organizational perspectives and product innovation models are noticeable. To illustrate how...