Analyzing Crowded City Sidewalk Characteristics

This question asks us to determine the economic nature of a "Crowded City Side Walk" concerning two key concepts: excludability and rivalry.

Understanding Excludability and Rivalry

• Excludability: This refers to the ability to prevent people who have not paid for a good or service from consuming it. If a good is excludable, access can be restricted.
• Non-excludable: It is difficult or impossible to prevent individuals from accessing or using the good, regardless of payment.
• Rivalry in Consumption: A good is rivalrous if one person's consumption of it prevents or diminishes another person's ability to consume it.
• Non-rivalry in Consumption: One person's consumption of the good does not affect another person's ability to consume it.

Characteristics of a Crowded City Side Walk

Let's analyze a "Crowded City Side Walk" based on these definitions:

• Excludability: Generally, city sidewalks are public spaces. It is very difficult, if not impossible, to prevent people from walking on them. Therefore, a city sidewalk is typically non-excludable.
• Rivalry: The term "crowded" is crucial here. When a sidewalk is crowded, the space occupied by one person walking limits the space available for others. One person's movement and presence can hinder or slow down others trying to use the same space. This indicates that consumption is rivalrous in a crowded setting.

Evaluating the Options

Based on the analysis:

• A crowded city sidewalk is non-excludable because people cannot easily be prevented from using it.
• A crowded city sidewalk is rivalrous because one person's use (walking space) diminishes another's ability to use it.

Therefore, the true characteristic is that it is non-excludable but rivalrous in nature.