nep-net New Economics Papers
on Network Economics
Issue of 2009‒08‒08
five papers chosen by
Yi-Nung Yang
Chung Yuan Christian University

  1. Regulation and Investment in Network Industries: Evidence from European Telecoms By Michał Grajek; Lars-Hendrik Röller
  2. Inventor networks in emerging key technologies: information technology vs. semiconductors By Holger Graf
  3. Linked versus Nonâ€linked Firms in Innovation: The Effects of Economies of Network in Agglomeration in East Asia By Machikita, Tomohiro; Ueki, Yasushi
  4. The evolution of knowledge and trade networks in the global wine sector: a longitudinal study using social network analysis By Lorenzo Cassi; Andrea Morrison; Anne Ter Wal
  5. The Performance of Gatekeepers in Innovator Networks By Holger Graf; Jens J. Krüger

  1. By: Michał Grajek; Lars-Hendrik Röller
    Abstract: We provide evidence of an inherent trade-off between access regulation and investment incentives in telecommunications by using a comprehensive data set covering 70+ fixed-line operators in 20 countries over 10 years. Our econometric model accommodates: different investment incentives for incumbents and entrants; a strategic interaction of entrants’ and incumbents’ investments; and endogenous regulation. We find access regulation to negatively affect both total industry and individual carrier investment. Thus promoting market entry by means of regulated access undermines incentives to invest in facilities-based competition. Moreover, we find evidence of a regulatory commitment problem: higher incumbents’ investments encourage provision of regulated access.
    Keywords: Telecommunications, Access Regulation, Unbundling, Investment
    JEL: C51 L59 L96
    Date: 2009–07
  2. By: Holger Graf (Friedrich Schiller University of Jena, Economics Department)
    Abstract: We analyze the development of the German knowledge base measured by co-classifications of patents by German inventors and relate this technological development to changes in the structure of the underlying inventor networks. Our central hypothesis states that technologies which become more central to the knowledge base are also characterized by a higher connectedness of the inventor network. We exemplify our theoretical considerations in a comparative study of two patenting fields - information technology and semiconductors. It turns out that information technology shows the highest increases in patents but shows no of a key technology. Contrary, semiconductors develops towards a key technology, despite a moderate increase in the number of patents. The dynamic analysis of inventor networks in both fields shows an increasing connectedness and the emergence of a large component in semiconductors but not in information technology, which is in line with our expectations.
    Keywords: Knowledge relatedness, Innovator networks, Interdisciplinary research, Patents, Key Technology
    JEL: O31 Z13
    Date: 2009–08–06
  3. By: Machikita, Tomohiro; Ueki, Yasushi
    Abstract: This paper proposes a new mechanism linking innovation and network in developing economies to detect explicit production and information linkages and investigates the testable implications of these linkages using survey data gathered from manufacturing firms in East Asia. We found that firms with more information linkages tend to innovate more, have a higher probability of introducing new goods, introducing new goods to new markets using new technologies, and finding new partners located in remote areas. We also found that firms that dispatched engineers to customers achieved more innovations than firms that did not. These findings support the hypothesis that production linkages and faceâ€toâ€face communication encourage product and process innovation.
    Keywords: Southeast Asia, East Asia, Technological innovations, Network, Communication, Business enterprises, Engineer Mobility, Innovation, Linkages
    JEL: D83 L25 O31 O32 O33 R12
    Date: 2009–03
  4. By: Lorenzo Cassi; Andrea Morrison; Anne Ter Wal
    Abstract: Throughout the last two decades or so the global pattern of wine production has undergone fundamental changes. New players have emerged and technological and organizational changes have reshaped the way wine is produced and marketed. The aim of this study is to increase our understanding into these processes. We map and compare trade and knowledge networks using social network techniques in order to show how globalization has affected this particular sector, and how the main actors of this industry have responded to these challenges. We are able to give account of the structural changes that have characterised the industry at global level over more than three decades and relate them to the features of the main trade and knowledge blocks.
    Keywords: trade network, knowledge network, social network analysis, wine sector
    JEL: R0 R1 R12
    Date: 2009–06
  5. By: Holger Graf (Friedrich Schiller University of Jena, Economics Department); Jens J. Krüger (Darmstadt University of Technology, Department of Law and Economics)
    Abstract: We investigate the impact of actors' positions within regional innovator networks on their innovative performance. The networks of four selected regions are based on information on patent applicants and inventors. Count data regressions show positive effects on innovation of both the total number of relations and of access to a larger knowledge base. However, when looking at innovators that are characterised by multiple internal and external contacts, our results suggest that these gatekeepers are not able to reap all the benefits associated with their brokering position. This implies that gatekeepers provide some sort of public good to the innovation system.
    Keywords: Innovator networks, Gatekeeper, Zero Inflated Generalised Poisson
    JEL: O31 Z13 R11
    Date: 2009–08–06

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