van Zon, Adriaan; Lontzek, Thomas S. - 2008
capital used for final goods production. The putty-practically-clay model is a strongly simplified version of a full putty-clay … model, that mimics all the relevant behaviour of a full putty-clay model, but that does not entail the administrative … complications of a full putty-clay model. In addition, we introduce an R&D sector that develops renewable and conventional energy …