Nash equilibrium existence and uniqueness in a club model

► Shows equivalence between a “joint product” public good model and a heterogeneous club model. ► For a normal club good, shows Nash equilibrium existence and uniqueness via Cornes and Hartley's aggregative games approach. ► Investigates normality when the club's quality function is homogeneous in the club's facility size and total usage. ► Under standard assumptions, shows normality holds for all positive degrees of homogeneity.