In a recent article, "Can One Both Contribute to and Benefit from Herd Immunity?", Lucie White (2021) argues that vaccine refusal is more like free riding than we have claimed it is. Here, critically reply White’s arguments.

We study the Markov equilibria of a model of free riding in which n infinitely lived agents choose between private consumption and irreversible contributions to a durable public good. We show that the set of equilibrium steady states converges to a unique point as depreciation converges to zero. For any level of depreciation, moreover, the highest steady state converges to the efficient level a...

In this report, we revisit a much explored topic in networking the search for a simple yet fully general and efficient multicast design. The many years of research into multicast routing have led to a generally pessimistic view that the complexity of multicast routing and interdomain multicast in particular can only be overcome by restricting the service model, as in the case of single-source m...

In the “Protection for Sale” model of Grossman and Helpman (1994), some industries are assumed to be able to overcome the free-rider problem and organize a lobby that represents their group interests while other industries are unable to form a lobby. This dichotomy presents a problem for the many papers that attempt to estimate the model empirically since every industry must be classified as ei...