The aim of this paper is to assess how three seminal coordination failure models (Diamond ((1982)1991), Howitt (1985) and Roberts (1987) have fared against ‘Keynes’s programme’. The first part of the paper characterises Keyne’s programme as consisting of the following four objectives :...

Presidential address for the Twelfth World Congress of the International Economic Association, summarising semi-formally the author's recent work and concerns. Uncertainty and incomplete markets breed demand volatility as well as price and wage rigidities. The conjunction of these leads to...

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...

In this paper, we introduce adoption costs in a vintage capital model. We assume that the incorporation of technological innovations into the production sector requires an extra labor cost during a fixed period. First, we show how adoption crucially matters in the shape of short run and...