What is the main idea of the passage?

An external cost occurs when an activity imposes real burdens on people outside the transaction and its receipt. (The delivery example and later cases all show consequences landing on third parties outside the exchange.)

Why might a company operate more noisy trucks than a community would prefer?

Its private calculation may omit the sleep disruption borne by residents. (The third paragraph links omitted community effects with an activity appearing cheaper and therefore occurring more.)

What does “lands” mean in “where a cost lands”?

is experienced or borne by someone (The phrase asks which people experience the consequence, even if they are outside the transaction.)

What effect do nearby residents experience in the truck example?

lost sleep (The opening paragraph states that truck noise causes residents along the route to lose sleep.)

The Cost Outside the Receipt: Level 3 Reading Comprehension Questions

A delivery company chooses noisy trucks because they are cheap to operate. Customers pay the delivery price, and the company pays for fuel, drivers, and repairs. Residents along the route, however, lose sleep. That disruption is a cost though it appears on neither the company's bill nor the customer's receipt.

Economists call such an effect an external cost, or externality. Part of the consequence of an exchange falls on people who did not choose it. Smoke affecting nearby lungs, bright signs disturbing neighboring homes, or waste damaging shared water can follow the pattern. The term identifies where a cost lands; it does not calculate the harm or select a policy.

When decision makers see only their private costs, an activity may look cheaper than it is for the community as a whole. That difference can lead to more noise or pollution than people would choose if all effects were considered. Responses might include rules, fees, bargaining, changed routes, or cleaner technology, depending on rights, evidence, and practical conditions.

The hidden cost is not imaginary simply because no receipt prints it. Recognizing an externality expands the boundary of the decision: whose time, health, property, or surroundings change when the transaction occurs?

Comprehension questions