when a production possibilities frontier is bowed outward, the opportunity cost of producing an additional unit of a good

When a production possibilities frontier (PPF) is bowed outward, the opportunity cost of producing an additional unit of a good increases as more of that good is produced.

Quick Scoop

Core idea in one line

As you move along a bowed‑out PPF toward more of one good, you must give up increasingly larger amounts of the other good per extra unit produced.

Why does opportunity cost increase?

Economists draw the PPF bowed outward (concave) to show the law of increasing opportunity cost.

• Resources (land, labor, machines) are not equally good at producing every good.

• At first, you reassign the resources that are relatively better suited to the new good, so you give up only a little of the other good.

• As you push production further, you must reassign resources that were very productive in the other good, so the amount of the other good sacrificed per extra unit rises.

A common textbook example: moving workers and land from “guns” to “butter.” At the beginning you move workers who are decent at both, but later you are forced to reassign workers and equipment that were highly specialized in guns, so each extra unit of butter costs you many more guns.

Multiple‑choice style answer

If you see this phrased as:

“When a production possibilities frontier is bowed outward, the opportunity cost of producing an additional unit of a good
a. increases as more of the good is produced
b. decreases as more of the good is produced
c. does not change as more of the good is produced
d. may increase or decrease as more of the good is produced”

The correct answer is: a. increases as more of the good is produced.

HTML table: shape of PPF and opportunity cost

html

<table>
  <thead>
    <tr>
      <th>Shape of PPF</th>
      <th>Opportunity cost pattern</th>
      <th>Typical explanation</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Linear (straight line)</td>
      <td>Constant opportunity cost for each extra unit.</td>
      <td>Resources are equally well suited to producing both goods.[web:3][web:9]</td>
    </tr>
    <tr>
      <td>Bowed outward (concave)</td>
      <td>Increasing opportunity cost as more of a good is produced.</td>
      <td>Resources are specialized; some are much better for one good than the other.[web:1][web:3][web:5][web:7][web:9]</td>
    </tr>
  </tbody>
</table>

SEO mini‑section

• Focus keyword: “when a production possibilities frontier is bowed outward, the opportunity cost of producing an additional unit of a good” — the key takeaway is that the opportunity cost rises as production of that good expands.

• This is a standard result in microeconomics and frequently appears in AP, IB, and first‑year university exam questions, often as a conceptual multiple‑choice item.

TL;DR: A bowed‑out PPF means each extra unit of a good costs you more and more of the other good, because you are forced to reallocate increasingly poorly suited resources.

Information gathered from public forums or data available on the internet and portrayed here.