During the spread of an infection, agents need to trade off the health costs of getting infected and the economic costs of taking protective actions. An agent’s health cost depends on the action of everyone in the society, leading to a game among agents with strategic substitutes. We study the...

In this paper, we study a conditional upgrade strategy that has recently emerged in the travel industry. After a consumer makes a reservation for a product (e.g., a hotel room), she is asked whether she would like to upgrade her product to a higher-quality (more expensive) one at a discounted...