This paper investigates a model with technological cycles induced by shifts in technologies. The key feature is that technological development occurs partly by discrete replacement of obsolete technologies, partly by continuous innovation of components for a pervasive general purpose technology....

Recently it has been suggested that low fertility countries may be caught in a trap that is hard to get out of. One important mechanism in such a trap would be social interaction and its effect on the ideal family size. Such social interaction mechanisms are hard to capture in formal models,...