We develop a general equilibrium model of vertical innovation in which multiple firms compete monopolistically in the quality space. The model features many firms that each hold the monopoly to produce a unique quality level of an otherwise homogenous good and consumers who are heterogeneous in...

This paper presents a tractable endogenous two-sector growth model with non-Gorman intra-temporal preferences and directed technical change. One of the two consumption goods is a necessity, whereas the other is a luxury. If the economy starts with a low initial knowledge stock, households are...

Guided by empirical evidence we consider firms heterogeneity in terms of factor intensity. We show that Heckscher-Ohlin comparative advantage and firm-level relative factor-intensity interact to jointly explain the observed differences in relative sales. Firms whose relative factor-intensity...

This paper studies the interaction between capital income taxation and a means tested age pension in the context of an overlapping generations model, calibrated to the UK economy. Recent literature has suggested a rehabilitation of capital income taxation (Conesa et al. (2009)), predicated on...

A production market with given preferences, technology and competition technology is vulnerable if it admits both perfect competition and monopoly or oligopoly. Under decreasing returns, the combination of sunk costs and a potential for monopoly profits can be sufficient basis for vulnerability,...

This paper examines the relation between aggregate elasticity of substitution (AES) and capital accumulation (the AES-K relation) in a general multi-sector Solow growth model with all CES production technologies. There are two intermediate goods produced by capital and labor, while the final...

The static trade literature has concluded that, absent distortions and bystanders, transfer induced movements in the terms of trade cannot be large enough (under Walrasian stability) to produce the transfer paradox. Dynamic one-sector models have argued that a transfer paradox is possible, but...

This paper examines the welfare-impact of trade from the premise that resources are limited and all goods in the long run consist of recyclable resources. It argues that export (import) of finished goods implies export (import) of the resources of which these goods exist. Trade affects the...

Floating exchange rates allow central banks to respond to aggregate demand fluctuations by changing their interest rates. However, such fluctuations create inertia in the labour market by increasing the cost of hiring and firing workers. A regime of flexible exchange rates can cause rigidities...