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From network ties to network structures: Exponential Random Graph Models of interorganizational relations

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  • Francesca Pallotti

    ()

  • Alessandro Lomi

    ()

  • Daniele Mascia

    ()

Abstract

Theoretical accounts of network ties between organizations emphasize the interdependence of individual intentions, opportunities, and actions embedded in local configurations of network ties. These accounts are at odds with empirical models based on assumptions of independence between network ties. As a result, the relation between models for network ties and the observed network structure of interorganizational fields is problematic. Using original fieldwork and data that we have collected on collaborative network ties within a regional community of hospital organizations we estimate newly developed specifications of Exponential Random Graph Models (ERGM) that help to narrow the gap between theories and empirical models of interorganizational networks. After controlling for the main factors known to affect partner selection decisions, full models in which local dependencies between network ties are appropriately specified outperform restricted models in which such dependencies are left unspecified and only controlled for statistically. We use computational methods to show that networks based on empirical estimates produced by models accounting for local network dependencies reproduce with accuracy salient features of the global network structure that was actually observed. We show that models based on assumptions of independence between network ties do not. The results of the study suggest that mechanisms behind the formation of network ties between organizations are local, but their specification and identification depends on an accurate characterization of network structure. We discuss the implications of this view for current research on interorganizational networks, communities, and fields. Copyright Springer Science+Business Media B.V. 2013

Suggested Citation

  • Francesca Pallotti & Alessandro Lomi & Daniele Mascia, 2013. "From network ties to network structures: Exponential Random Graph Models of interorganizational relations," Quality & Quantity: International Journal of Methodology, Springer, vol. 47(3), pages 1665-1685, April.
  • Handle: RePEc:spr:qualqt:v:47:y:2013:i:3:p:1665-1685
    DOI: 10.1007/s11135-011-9619-6
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    References listed on IDEAS

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    5. Brian Uzzi & Ryon Lancaster, 2003. "Relational Embeddedness and Learning: The Case of Bank Loan Managers and Their Clients," Management Science, INFORMS, vol. 49(4), pages 383-399, April.
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    Cited by:

    1. repec:spr:scient:v:102:y:2015:i:1:d:10.1007_s11192-014-1377-5 is not listed on IDEAS
    2. Yongli Li & Chong Wu & Zizheng Wang, 2015. "An information-theoretic approach for detecting communities in networks," Quality & Quantity: International Journal of Methodology, Springer, vol. 49(4), pages 1719-1733, July.

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