Technological progress as a major source of economic development stems from the interaction of two types of innovations, drastic and incremental. While the former sets the fundamental pace of economic progress by redefining production possibilities as Schumpeter strongly emphasized, the latter...

This paper establishes a model, where up-stream firms 'produce' drastic innovations and down-stream firms specialize in final goods production. A drastic innovation obsolesces the existing technology but down-stream firms can improve it by their incremental innovations. The economy develops in...

The static differentiated product demand model when applied to products with rapid product turnover and declining prices, yields implausible results. One response is to explicitly model the inter-temporal choices of consumers but computational demands require restrictive assumptions on consumer...