Economics Exam Notes: Scarcity, Opportunity Cost, and the Production Possibility Curve

Scarcity, Opportunity Cost, and the Production Possibility Curve

Introduction to Economic Fundamentals

  • Core Focus of Economics: The allocation of scarce resources.
  • Illustrative Tools: The Production Possibility Curve (PPC), also known as the transformation curve, is used to demonstrate:
    • Scarcity
    • Allocation
    • Choice
    • Opportunity Cost
  • These concepts hold significant relevance to real-world economic scenarios.

Assumptions for the Production Possibility Curve (PPC)

  • Two Commodities: The economy produces only two goods, conventionally "guns" and "butter."
  • Fixed Resources: A fixed amount of resources (e.g., machinery, workers) is available for production.
  • Given Technology: The state of technology is constant.
  • Full Employment: All available resources of given quantity and quality are fully utilized in producing one or both goods. This means the analysis begins under conditions of full employment of the factors of production.
  • Production Frontier: Under these assumptions, production occurs only on the frontier of the transformation curve.
  • Production Capabilities: The distance of the frontier from the origin illustrates the economy's current production capabilities for the two goods.

Understanding Choice and Opportunity Cost

  • Choice on the Frontier: Any position on the PPC frontier is available and can be selected, representing a specific combination of the two goods.
  • Incurring Cost: The selection of any position on the frontier inherently involves incurring a cost in terms of forgone or sacrificed production.
  • Definition of Opportunity Cost:
    • General Definition: The total of what is given up or sacrificed to be at a selected position.
    • PPC Context: Measured in terms of forgone physical production in the case of the production possibility curve.
    • Broader Application: Measured by what could have been earned or obtained if the next best alternative option had been exercised.
    • True Cost: To determine the true cost of a current choice, any costs directly associated with the current position must be considered in addition to what has been forgone.
  • Significance: Opportunity cost is a crucial concept for determining the allocation and potential reallocation of resources within an economy.
  • Future Applications: The concept will be applied to cost curves and the rewards necessary to retain factors of production in their current employments.

Real-World Example of Opportunity Cost

  • Scenario: An individual operates their own business, receiving payments of 50,000 dollars a year while working twelve hours a day.
  • Initial Reaction: Favorable.
  • Considering Alternatives: If the same person has the option of working for someone else and receiving 100,000 dollars a year for eight hours of work.
  • Opportunity Cost: By choosing to run their business, the person is forgoing an option that gives a greater reward (100,000 income for less work).
  • Resource Reallocation: If the person moves to take up the alternative position and the business closes, all resources that made up the business become available for reallocation in the economy.
  • Retention Incentive: For the existing business to retain the owner-operator's services, it would need to offer a reward equal to what is available in the next best alternative employment (i.e., 100,000 per year for comparable hours).

The Production Possibility Curve and Resource Reallocation

  • Collective Decision to Alter Production: If a society decides to change the combination of goods produced along the PPC, increasing the output of one commodity necessarily means reducing the output of the other.
  • Mechanism of Change: Resources previously used for the higher quantity of the one good must be reallocated into the production of the other commodity.
  • Full Employment Maintenance: This movement occurs along the frontier, ensuring that the economic system maintains full employment of its resources.
  • Unattainable Combinations: Any point or combination of goods located above the frontier is impossible to achieve under the current assumptions and resource limits of the model.
  • Frontier Shift: Such combinations can only be generated if the PPC frontier shifts outward, indicating economic growth or an increase in resources/technology.
  • Root Cause: Scarcity is the fundamental reason for the necessity of choice, resource reallocation, and the limits imposed by the production frontier.

Increasing Cost and Decreasing Returns on the PPC

  • Graphical Representation (Figures 1-1, 1-2A, 1-2B): These figures illustrate the principle of increasing cost and decreasing returns.
  • Movement Along the Frontier (Decreasing Returns - Figure 1-2A):
    • When the production of guns is reduced by constant increments, the resulting increases in butter production are observed.
    • The additional gain obtained in added butter production becomes less and less with each additional reduction in gun production.
    • Explanation: As resources shift from producing guns to producing butter, they may lack some of the skills needed in the production of the alternative good. Additionally, expanded production of one commodity can introduce coordination problems and interference problems among the factors of production as output and factor employment levels increase. This phenomenon describes decreasing returns.
  • Movement Along the Frontier (Increasing Cost - Figure 1-2B):
    • When butter production is increased by constant amounts, the size of each corresponding reduction in gun production grows larger.
    • This demonstrates the "increasing cost" aspect: to obtain consistently more of one good, an increasingly larger amount of the other good must be sacrificed.
  • Economic Principle: In economics, whenever the word "increasing" appears, there will generally be a related concept that has the term "decreasing" attached to it (e.g., increasing cost implies decreasing returns). This highlights the inverse relationship between the cost incurred and the returns gained when reallocating resources under these conditions.