International Society of Dynamic Games

  • DGA Seminar: Bacel Maddah

    Bacel Maddah
    American University of Beirut
    Lebanon

    Dynamic Games and Applications Seminar

    Pricing, Assortment, and Inventory Decisions under Nested Logit Demand and Equal Profit Margins

    October 12, 2023
    11:00 AM — 12:00 PM (Montreal time)

    Webinar link

    We consider the interdependent decisions on assortment, inventory and pricing of substitutable products under a nested logit consumer choice, and a single-period, newsvendor-type, supply setting. This applies to fashion goods. We assume that all products have equal profit margins. Under a Taylor series-type approximation, we derive several concavity properties of the expected profit function, and gain insights into the structure of the optimal solution. Our results allow developing an efficient, single-variable search, heuristic for jointly deciding on assortment, pricing, and inventory decisions. We argue that our approach continues to hold under more general consumer choice.

  • DGA Seminar: Luluwah Al Fagih

    Luluwah Al Fagih
    Hamad Bin Khalifa University
    Qatar

    Dynamic Games and Applications Seminar

    Game Theoretic Approaches for Smart Communities

    September 28, 2023
    11:00 AM — 12:00 PM (Montreal time)

    Webinar link

    In the first part of this talk, a smart energy management scheme based on a non-cooperative dynamic game approach will be presented. The game participants compete for the lowest electricity bill by scheduling their individual energy storage systems. The developed system takes advantage of a pricing tariff offered by a utility company that aims at flattening the aggregated load of a neighbourhood of households during peak times. Simulations show whether a game theoretic approach between households is more efficient than an individualistic one and if a near-constant load can be achieved when a critical mass of battery owners is available. In the second part of this talk, the energy scheduling game will be mapped to address the issue of the shortage of Personal Protective Equipment (PPE) that occurred during the COVID-19 outbreak. Experiments conducted for NHS England regions using actual data confirm that the challenge of securing PPE supply during disasters such as COVID-19 can be eased if specific stock management procedures are adopted.

  • DGA Seminar: Hassan Benchekroun

    Hassan Benchekroun
    McGill University
    Canada

    Dynamic Games and Applications Seminar

    Economically Exhaustible Resources in an Oligopoly-Fringe Model with Renewables

    September 21, 2023
    11:00 AM — 12:00 PM (Montreal time)

    Webinar link

    We consider a game between oligopolistic and fringe suppliers of fossil fuel from an exhaustible resource, and of producers of a renewable perfect substitute. Extraction costs are stock-dependent and strictly convex in the rate of extraction. We characterize the open-loop equilibrium analytically and perform numerical simulations with calibrated parameter values. The effects of our cost assumptions are (i) to have asymptotic, economical instead of physical exhaustion of the non-renewable resource and (ii) the existence of a non-traditional limit-pricing phase in which both fossil and renewables suppliers are active. We decompose the welfare loss of imperfect competition in a conservation and a sequence effect and show that both can be substantial: 3.8 and 4.2 trillion US$ in the calibrated model, respectively. We also find that initial carbon emissions depend non-monotonically on the renewables subsidy rate.

    (with Gerard van der Meijden et Cees Withagen)