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The concept sectoral system of innovation and production provides a multidimensional, integrated and dynamic view of sectors. It is proposed that a sectoral system is a set of products and the set of agents carrying out market and non-market interactions for the creation, production and sale of those products. A sectoral systems has a specific knowledge(More)
We discuss how standard computable equilibrium models of trade policy can be enriched with selection effects without missing other important channels of adjustment. This is achieved by estimating and simulating a partial equilibrium model that accounts for a number of real world effects of trade liberalisation: richer availability of product varieties;(More)
The paper provides a contribution to the recent debate about targets and effectiveness of network policies at the EU level, by presenting a detailed analysis of the large R&D network that has emerged over Framework Programmes. Social network analysis and graph theory are employed to describe structural properties and dynamics of the emerging network, which(More)
Based on longitudinal data for a matched sample of 592 Italian academic inventors and controls, the paper explores the impact of patenting on university professors' scientific productivity, as measured by publication and citations counts. University professors who appear as designated inventors on at least one patent application at the European Patent(More)
In models with heterogeneous firms trade integration has a positive impact on aggregate productivity through the selection of the best firms as import competition drives the least productive ones out of the market. To quantify the impact of firm selection on productivity, we calibrate and simulate a multi-country multi-sector model with monopolistic(More)
We use social network analysis to evaluate 'behavioural' additionality aspects of public programmes supporting research and development (R&D). The paper appraises empirically the partnership and knowledge networks created around the R&D activities of the Information Society Priority of the Sixth Research Framework Programme of the European Community. These(More)
This paper explores the main patterns of firms' technological diversification and the main factors affecting the extent and direction of technological diversification. The basic point of this paper is that a major drive for technological diversification is knowledge. Two dimensions of knowledge are examined here: cumulativeness and proximity. The first(More)
This paper has shed light on the processes of technological diversification and specialization by firms. European, American and Japanese firms have been examined in 25 technological fields within telecommunications, information and audiovisual technologies for the period 1978-1998. In general, in electronics technologies incumbent firms are engaged in(More)
The structure of social networks within and across cities influences urban creativity and the potential for new knowledge creation. We propose that cities achieve greater inventive creativity when there is (1) a short average social distance among inventors in a city, and (2) those inventors are highly clustered. A short average social distance allows(More)