International Society of Dynamic Games

  • DGA Seminar: Evolutionary Dynamics of Costly Signaling

    Christina Katt-Pawlowitsch
    Université Paris-Panthéon-Assas, France

    Dynamic Games and Applications Seminar

    Evolutionary Dynamics of Costly Signaling

    Oct 16, 2025   11:00 AM — 12:00 PM (Montreal time)

    Zoom webinar link

    In this talk, I give an overview of three recent works joint with Josef Hofbauer on the evolutionary dynamics of costly signaling in three larger classes of games:

    games in which the costly signal imposes a cost also on the receiver in case they accept to engage with the sender in the social exchange at stake (hiring, buying, mating). Examples of this last scenario are: agency commissions at conclusion of a contract, sickness presenteeism (attending work while sick), and politeness in language.

    classical costly-signaling games à la Spence (education as a costly signal in the job market) and Zahavi (display of ‘handicaps’ in mating, stotting, coloration of autumn leaves), as investigated in Hofbauer and Pawlowitsch (2025 IJGT),

    games in which players get a positive payoff increment when producing a signal (Hofbauer and Pawlowitsch 2025, Dynamic Games and Applications), and,

  • DGA Seminar: Peer-to-Peer Sharing, Price Competition, and Consumers’ Awareness

    Carmen Arguedas
    Universidad Autónoma de Madrid, Spain

    Dynamic Games and Applications Seminar

    Peer-to-Peer Sharing, Price Competition, and Consumers’ Awareness

    Oct 9, 2025   11:00 AM — 12:00 PM (Montreal time)

    Zoom webinar link

    In this paper, we present a model of product differentiation where two firms can offer either a standard or a circular version of a product. The latter refers to a version of the good that can be shared in a peer-to-peer sharing platform. Consumers are heterogeneous concerning the amount of time they use the goods for themselves and can end up being either consumers of the standard product, or prosumers or users of the circular product. We characterize the equilibrium for given degree of maturity of the sharing market, maximum consumers’ use intensity and marginal cost differences between the two varieties. Key to our results is whether consumers care for circularity. In the absence of environmental awareness, there is very little space for the circular product when coexisting with a standard variety: the circular good is more expensive, it has a lower market share, and results in lower, albeit positive, profits. Things change dramatically if consumers experience bad conscience when purchasing the standard version: the circular product continues to be more expensive, but it may beat the standard one in market share and profits. This can even result in the two firms offering the circular variety in equilibrium. Our findings suggest that consumers’ environmental awareness can be a key driver for the transition towards the circular economy.

    (With F. André, C. Ranocchia and S. Rousseau).

  • UT Dallas Conference Honoring Suresh Sethi, September 26-28, 2025

    There is a special conference honoring Prof. Suresh Sethi’s 80th birthday
    September 26-28, 2025 at the Jindal School of Management of UT Dallas (USA).

    Additional information about the conference is available at https://utd-om.org .