This paper introduces excluding outlier voters (EOV) as a general mechanism for revealing true preferences in social choices, and for discouraging voters from strategic voting and manipula-tion. This mechanism is general in that it can be implemented with any voting system. The paper...

Our societies are heterogeneous in many dimensions such as census, education, religion, ethnic and cultural composition. The links between individuals - e.g. by friendship, marriage or collaboration - are not evenly distributed, but rather tend to be concentrated within the same group. This...

A group of individuals, with a potential conflict of interest, face a choice among alternatives. There is a network externality such that the chosen alternative yields value only if sufficiently many individuals get on board. Their preferences for each alternative and the benefit derived from a...

The discrete choice literature has evolved from the analysis of a choice of a single item from a fixed choice set to the incorporation of a vast array of more complex representations of preferences and choice set formation processes into choice models. Modern discrete choice models include rich...

Draw an agent's preferences over $n$ alternatives at random as follows: independently, for each pair of distinct alternatives, with probability $1-p$ the agent is indifferent between the alternatives in the pair, and with probability $p$ the agent is equally likely to prefer one alternative over...

We develop a model of social preferences for network games and study its predictions in a local public goods game with multiple equilibria. The key feature of our model is that players' social preferences are heterogeneous. This gives room for disagreement between players about the “right”...

We study the dynamic optimization of platform pricing in industries with positive direct net-work externalities. The utility of the network for the consumer is modelled as a function of three components. Platform price and network size (participation rate) affect the consumer's decision to join...

Homophily is typically measured using a single dimension to define groups. However, people generally display preferences over multiple dimensions. I develop a simple model that characterizes agents both by a (discrete) "type" and a (continuous) "personality" value. Agents have...

We develop a model of social preferences for network games and study its predictions in a local public goods game with multiple equilibria. The key feature is that players' social preferences are heterogeneous. This gives room for disagreement between players about the "right" payoff ordering....

In this paper we fully characterize an individual's choice behaviour according to three different so-called external references. The first system which we describe axiomatically is standard utility maximization or preference optimization. The second approach characterizes the choice of the...