Recent evidence on world trade patterns reveals North-South specialization across products of the same industries and product groups but different quality, which is not matched by the predictions of traditional and new trade theory. This paper analyzes a model of North-South trade and endogenous...

We analyze the impact of obsolescence of economic inventions by incorporating maintenance costsin the endogenous growth model of expanding product varieties. This contrasts with the existingliterature, which ignores maintenance costs and uses the model of quality improvements todescribe...

This article shows - on both conceptual and empirical grounds - the importance of business cycles in affecting key relationships between innovation and international performance. While periods of upswing are characterised by a well documented 'virtuous circle'. between innovation inputs, new...

This research explores the effects of distance to the pre-industrial technological frontiers on comparative economic development in the course of human history. It establishes theoretically and empirically that distance to the frontier had a persistent non-monotonic effect on a country's...

This article shows -- on both conceptual and empirical grounds -- the importance of business cycles in affecting key relationships between innovation and international performance. While periods of upswing are characterized by a well-documented 'virtuous circle' between innovation inputs, new...

We analyze recent contributions to growth theory based on the model of expanding variety of Romer (1990). In the first part, we present different versions of the benchmark linear model with imperfect competition. These include the 'labequipment' model, labor-for-intermediates' and 'directed...

We construct and estimate a unified model combining three of the main sources of cross-country income disparities: differences in factor endowments, barriers to technology adoption and the inappropriateness of frontier technologies to local conditions. The key components are different types of...

We construct and estimate a unified model combining three of the main sources of cross-country income disparities: differences in factor endowments, barriers to technology adoption and the inappropriateness of frontier technologies to local conditions. The key components are different types of...

I develop a model for a small, open, technology-lagging economy that imports leading-edge knowledge from the technology leader by paying high-skilled researchers from the leading country their opportunity cost to train the lagging country's future high-skilled workers while adding to a local...

The paper explores firstly the impact of technological change on trade growth at the country level, using trade statistics and statistics on patenting activity in the US, across 20 countries for 17 manufacturing sectors. Secondly, using structural decomposition analysis, the paper examine...