Modeling Climate Negotiations as a Game Between the US and China

An economist develops a model where only two neighboring farms must independently decide whether to reduce their water usage from a shared, depleting aquifer. The stated purpose of this model is to understand the challenges of achieving widespread conservation among thousands of users in a large water basin. What is the primary justification for using such a highly simplified, two-actor model to study this complex, large-scale problem?

Evaluating Simplified Economic Models

Evaluating a Simplified Model for Environmental Policy

Justifying Model Simplification in Economics

An economist seeks to understand a complex social problem by first creating a simplified model. The key assumption in this model is that individuals make their decisions independently and without any direct coordination. Which of the following large-scale problems is most suitable for analysis with a model based on this specific assumption?

The key assumption in a simple two-farmer economic model—that each farmer acts independently without coordinating with the other—is included because it is the most accurate and realistic depiction of how all individuals interact in large-scale social problems.

To understand a complex global issue, an economist models it as a simple game between two farmers deciding independently whether to use a polluting technology. Match each element of this simplified model to the principle or real-world feature it represents.

A simple economic model demonstrates that two neighboring farms, each acting independently to maximize their own profit, will both choose to use a pesticide that contaminates a shared water source. This leads to a worse outcome for both farms than if they had coordinated to avoid using the pesticide. When this model's insight is applied to a large-scale environmental problem involving thousands of independent actors, what fundamental issue does it highlight?

Evaluating Policy Using a Simplified Model

Analyzing the Limits of Simple Economic Models

Using Game Theory to Model Social Interactions