2006–2010

Who´s Who in Networks. Wanted: The Key Player

Reprint No. 2006:14

Author(s): Coralio Ballester, Antoni Calvó-Armengol and Yves ZenouYear: 2006 Title: Econometrica Volume (No.): 74 (5) Pages: 1403–1417


Finite population noncooperative games with linear-quadratic utilities, where each player decides how much action she exerts, can be interpreted as a network game with local payoff complementarities, together with a globally uniform payoff substitutability component and an own-concavity effect. For these games, the Nash equilibrium action of each player is proportional to her Bonacich centrality in the network of local complementarities, thus establishing a bridge with the sociology literature on social networks. This Bonacich–Nash linkage implies that aggregate equilibrium increases with network size and density. We then analyze a policy that consists of targeting the key player, that is, the player who, once removed, leads to the optimal change in aggregate activity. We provide a geometric characterization of the key player identified with an intercentrality measure, which takes into account both a player’s centrality and her contribution to the centrality of the others.


Reference:
Ballester, Coralio, Antoni Calvó-Armengol and Yves Zenou (2006), "Who´s Who in Networks. Wanted: The Key Player". Econometrica 74(5), 1403–1417.

An Agenda for Europe

Institutional Reform for Innovation and Entrepreneurship

Omslag 2017 Institutional Reform for Innovation and Entrepreneurship.jpg

The authors of this book, Niklas Elert, Magnus Henrekson and Mikael Stenkula, advise the economies of the European Union to become more entrepreneurial in promoting innovation and economic growth. The authors propose a reform strategy with respect to several aspects to achieve this goal.

Events

Seminars organized by IFN

 

To present ongoing research informal brown-bag seminars are held on Mondays at 11:30 am. This is an opportunity for IFN researchers to test ideas and results.

Academically oriented seminars are most of the time held on Wednesdays at 10 am. At these events researchers from IFN and other institutions present their research.

In addition, IFN organizes seminars open to the public. Topics for these are derived from the IFN research.

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