tag:blogger.com,1999:blog-5432572017178461989.post4429633680899960853..comments2022-03-31T20:32:25.983-04:00Comments on PM's Question Time: The price elasticity of labor-saving devicesUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5432572017178461989.post-77374973652405899262012-04-12T20:03:41.019-04:002012-04-12T20:03:41.019-04:00Everett Rogers mentions the telephone as the arche...Everett Rogers mentions the telephone as the archetypal innovation that carries a network externality. That is, its utility depends on how many other people have previously adopted it. To that, I would probably add that many innovations also require infrastructure (e.g., the auto).Anonymousnoreply@blogger.com