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A dynamic theory of fidelity networks with an application to the spread of HIV/AIDS

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  • Roland Pongou

    ()
    (Brown University)

  • Roberto Serrano

    ()
    (Brown University and IMDEA Social Sciences)

Abstract

We study the dynamic stability of fidelity networks, which are networks that form in a mating economy of agents of two types (say men and women), where each agent desires direct links with opposite type agents, while engaging in multiple partnerships is considered an act of infidelity. Infidelity is punished more severely for women than for men. We consider two stochastic processes in which agents form and sever links over time based on the reward from doing so, but may also take non-beneficial actions with small probability. In the first process, an agent who invests more time in a relationship makes it stronger and harder to break by his/her partner; in the second, such an agent is perceived as weak. Under the first process, only egalitarian pairwise stable networks (in which all agents have the same number of partners) are visited in the long run, while under the second, only anti-egalitarian pairwise stable networks (in which all women are matched to a small number of men) are. Next, we apply these results to find that under the first process, HIV/AIDS is equally prevalent among men and women, while under the second, women bear a greater burden. The key message is that anti-female discrimination does not necessarily lead to higher HIV/AIDS prevalence among women in the short run, but it does in the long run.

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Paper provided by Instituto Madrileño de Estudios Avanzados (IMDEA) Ciencias Sociales in its series Working Papers with number 2009-03.

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Date of creation: 10 Apr 2009
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Handle: RePEc:imd:wpaper:wp2009-03

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Keywords: fidelity networks; anti-female discrimination; stochastic stability; HIV/AIDS; union formation models;

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Cited by:
  1. S. Goyal & A. Vigier, 2013. "Attack, Defense and Contagion in Networks," Cambridge Working Papers in Economics 1327, Faculty of Economics, University of Cambridge.
  2. Paul Cahu & Falilou Fall, 2011. "Accounting for the effects of AIDS on growth in Sub-Saharan Africa," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00609798, HAL.
  3. Yusuke Kamishiro & Roberto Serrano, 2009. "Equilibrium Blocking in Large Quasilinear Economies," Working Papers 2009-12, Brown University, Department of Economics.
  4. Itay P. Fainmesser, 2012. "Community Structure and Market Outcomes: A Repeated Games-in-Networks Approach," American Economic Journal: Microeconomics, American Economic Association, vol. 4(1), pages 32-69, February.
  5. Roland Pongou & Roberto Serrano, 2013. "Volume of Trade and Dynamic Network Formation in Two-Sided Economies," Working Papers 2013-6, Brown University, Department of Economics.
  6. Roland Pongou & Roberto Serrano, 2013. "Fidelity Networks and Long-Run Trends in HIV/AIDS Gender Gaps," American Economic Review, American Economic Association, vol. 103(3), pages 298-302, May.
  7. Pongou, Roland & Serrano, Roberto, 2013. "Dynamic Network Formation in Two-Sided Economies," MPRA Paper 46021, University Library of Munich, Germany.

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