Friday Meeting - Paolo Zeppini (GREDEG)

"The Garden Model"
Quand ? Le 30-03-2018,
de 10:00 à 12:00
Où ? ISEM - Salle SCI
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Title: "The Garden Model"

Abstract: Environmental challenges like climate change are essentially social dilemma of public goods contribution. In this project we design a discrete choice model of environmental public goods, named the Garden Model, in two different settings: the garden as a pure public good, with free riding, and a garden club good, that only contributors can enjoy. The latter version allows for a general setting where contributions can be negative, and describe exploitation of the public good. We frame decisions in a population dynamics setting, and use the logistic distributions of discrete choice as a revision protocol. The different settings of the model entail positive feedback scenarios, with possible multiple equilibria, and negative feedback scenarios, with possible periodic dynamics. The ultimate goal of the project is to evaluate aggregate contributions, measured as the Garden beauty. The setting with positive feedback can present the surprising scenario where for a positive shock on the marginal contribution benefits, individual contributions increase, while the resulting Garden beauty decreases. The model is designed for the different equilibrium outcomes to be tested in laboratory experimental treatments.