Inspired by the negotiations leading up to the Paris Agreement on climate change, I study a bargaining game where every party is proposing only its own contribution, before the set of pledges must be unanimously approved. I show that, with uncertain tolerance for delay, each equilibrium pledge...

A simple dynamic game is used for analyzing international environmental problems and climate agreements. Different countries are, over time, emitting as well as investing in green technology. In this framework, we can analyze the business-as-usual outcome, short vs. long term agreements,...

Below, I illustrate how a wide range of political economics forces influence nations' provisions of global public goods. The forces can make it difficult for international cooperation to succeed, but they can also be taken advantage of by carefully designed treaties, so that they are stronger...

I develop a dynamic model of costly private provision of public goods where agents can also invest in cost-reducing technologies. Despite the n+1 stocks in the model, the analysis is tractable and the (Markov perfect) equilibrium unique. The framework is used to derive optimal incomplete...

A "conservation good" (such as a tropical forest) is owned by a seller who is tempted to consume (or cut), but a buyer benefits more from conservation. The seller does conserve if the buyer is expected to buy, but the buyer is unwilling to pay as long as the seller conserves. This contradiction...

This paper explores how a principal with time-inconsistent preferences invests optimally in technology or capital. If the current principal prefers her future self to save more, she can increase current investments complementary to future savings and decrease investments in the strategic...