Key Players

Reprint No. 2016:21

Author(s): Yves ZenouYear: 2016 Title: Oxford Handbook of the Economics of Networks Chapter: 11Editor(s): Yann Bramoullé, Andrea Galeotti and Brian RogersPublisher: Oxford University PressCity: Oxford, UK Pages: 244–274
Online article (restrictions may apply)

In this chapter, we provide an overview of the literature on key players in networks. We first introduce the theoretical concept of the key player who is the agent that should be targeted by the planner so that, once removed, she will generate the highest level of reduction in total activity. We also consider another notion of key players where the planner is targeting a set of network nodes that are optimally positioned to quickly diffuse information, attitudes, behaviors or goods. Then, we examine the empirical tests of the key-player policies for criminal networks, education, R&D networks, financial networks and diffusion of microfinance. We show that implementing such a policy outperforms other standard policies such as targeting the most active agents in a network.

Zenou, Yves (2016), "Key Players". Chapter 11, pp. 244–274 in Yann Bramoullé, Andrea Galeotti and Brian Rogers, eds., Oxford Handbook of the Economics of Networks. Oxford, UK: Oxford University Press.

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In this book Andreas Bergh, Therese Nilsson, IFN and Lund University, and Daniel Waldenström, IFN and Paris School of Economics, France, review the latest research on the relationship between inequality and health. What does inequality mean for our health? Does increasing income inequality affect outcomes such as obesity, life expectancy and subjective well-being?


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