Opportunity Cost and Production Possibilities Frontier (PPF) Notes

Opportunity Cost and Production Possibilities Frontier (PPF)

• Opportunity Cost Definition:

  • Opportunity cost is defined as the ratio of the decrease in the quantity produced of one good to the increase in the quantity produced of another good as we move along the production possibilities frontier (PPF).

• Example Calculation:

  • Referring to Figure 2.1 in the transcript:
  • Moving from point D to point C:
    • Quantity of cooldrink produced increases by 3 million cans.
    • Quantity of hamburgers produced decreases by 1 million.
  • Therefore, choosing point C over point D results in:
  • Additional 3 million cans of cooldrink costing 1 million hamburgers.
  • This indicates that 1 can of cooldrink costs 1/3 of a hamburger.

• Understanding Opportunity Cost:

  • The opportunity cost is expressed as a ratio, where:
  • ext{Opportunity Cost} = rac{ ext{Decrease in quantity of good A}}{ ext{Increase in quantity of good B}}
  • In this case:
  • ext{Opportunity Cost of Cooldrink} = rac{1 ext{ million hamburgers}}{3 ext{ million cans cooldrink}}
  • The converse is also true. The opportunity cost of producing more hamburgers is:
  • ext{Opportunity Cost of Hamburger} = rac{3 ext{ million cans cooldrink}}{1 ext{ million hamburger}}

• Inverse Relationship:

  • The opportunity cost of producing an additional can of cooldrink is the inverse of the opportunity cost of producing an additional hamburger:
  • If the opportunity cost of a hamburger is 3 cans of cooldrink, then the cost of producing one cooldrink in terms of hamburgers is:
  • The inverse of 3, which is 1/3 hamburgers per cooldrink.

• Key Takeaway:

  • As we decrease the production of hamburgers and increase the production of cooldrinks, the cost calculated showcases the trade-offs between the two goods based on their opportunity costs as represented on the PPF.