In this paper, we introduce adoption costs in a canonical vintage capital model. Adoption costs take the form of a direct loss in production during a fixed period of time. We explicitly characterize the optimal machine replacement policy as a function of the adoption period. Using an explicit...

This paper documents the existence of a "middle-income trap" for the Middle East and North Africa region. It argues that the economic woes of the Middle East and North Africa offer new insights into the debate on the trap which has thus far focused on the East Asia and Pacific region. The...