(Module 1) Lecture 4: Loose Assumptions in the Production Possibility Model

The production possibility model (PPC) begins with a set of four restrictive assumptions that are eventually loosened to reflect real-world economic scenarios: - Fixed Resources: The quantity/level of land, labor, capital, and entrepreneurial ability is held constant. - Fixed Technology: There are no advancements in the production process; the methods used to turn inputs into outputs do not change, meaning worker efficiency is stagnant. - Full Employment: The economy is utilizing all of its available resources at the highest possible efficiency. - Two Goods: For the sake of simplicity, the model assumes only two items are being produced (e.g., corn and smartphones).

When the assumption of fixed resources is loosened, changes in the quantity of factors of production (land, labor, capital) shift the curve.
Outward Shifts (Economic Growth): - If resources increase—for example, increasing available labor hours up to $50,000$ hours—the production capabilities of the economy expand. - An increase in any resource allows for the production of more of one or both goods. - In the example provided, an increase in labor hours shifts the original blue line (where max production was $5,000$ bushels of corn or $1,000$ smartphones) to a new orange line. - Implications of a Shift Outward: - Points on the old blue line that were once considered "attainable and efficient" are now considered "attainable but inefficient." - The new efficient bundles now lie on the new orange PPC. - While more points are now attainable than before, points outside the orange line remain "unattainable."
Inward Shifts (Economic Contraction): - If there is a decrease in labor hours (e.g., workers choosing more leisure time or a literal reduction in the workforce), the PPC shifts inward. - In this scenario, bundles that were previously on the blue line become "unattainable," requiring the economy to adjust production to lower levels.

Technological changes can be general or localized to one specific industry. If technology only improves for one good, it results in a "pivot" rather than a parallel shift.
Example: Smartphone Technology Improvement: - In this scenario, technology for producing bushels of corn remains fixed, while technology for smartphones improves (e.g., requiring fewer labor hours per unit). - This allows the economy to produce more smartphones with the same resources. If all resources go to smartphones, production might increase from $1,000$ units to $2,000$ units. - However, if all resources go to corn, the maximum output remains unchanged at $5,000$ bushels.
Resulting Pivot: - The curve pivots outward only along the axis representing smartphones. - Points on the old blue line are now inefficient. To be efficient, the economy must operate on the new orange line created by the technological advancement. - Producing below this new orange line means the economy is not exercising "full employment" of its new technological potential.

It is critical to distinguish between a loss of capacity (shifting the curve) and unemployment (operating inside the curve).
Non-Shift Condition: When an economy suffers from unemployment, the PPC itself does not shift. The number of possible labor hours, land, and technology remains the same.
Operating Point: Unemployment means the economy is operating at a point "inside" (beneath) the PPC. - Example: If an economy is producing at a point such as $4$ smartphones and $2,000$ tons of corn while its capacity is much higher, it is in an inefficient state caused by idle resources (workers waiting for jobs, land sitting vacant).
Zero Opportunity Cost: The major takeaway from an unemployment situation is that the economy can increase production of one or both goods at zero opportunity cost. This is possible by simply putting idle resources back to work rather than reallocating resources from one good to another.

Constant Opportunity Cost: - Represented by a straight-line PPC. - Occurs when resources are perfectly adaptable. For example, if adding $250$ smartphones always costs exactly $1,250$ bushels of corn regardless of the starting point, the opportunity cost is constant.
Increasing Opportunity Cost: - Represented by a "bowed-out" (concave) PPC from the origin. - This is the standard expectation for real-world economies due to Specialized Resources.

Resources are often better suited for producing specific goods rather than others.
Case Study: Iowa Farmland vs. Coastal Beaches: - Context: An economy produces Corn and Tourism. - Iowa Farmland: Excellent soil for corn; low appeal for tourism. - Coastal Beaches: Excellent for tourism; poor soil for corn.
Scenario A: Shifting Iowa from Tourism to Corn: - If the economy starts by using all land for tourism and decides to produce corn, it should first convert Iowa land. - Result: A massive gain in corn with a minimal loss in tourism (low opportunity cost), because Iowa was not a popular tourist destination initially.
Scenario B: Shifting Beaches from Tourism to Corn: - As the economy demands more and more corn, it is eventually forced to use beach land for agriculture. - Result: A very small gain in corn (due to poor soil) but a massive loss in tourism revenue (high opportunity cost).
Conclusion: This dynamic creates the "bowed-out" shape of the PPC. As you move along the curve to produce more of one good, the opportunity cost grows because you are forced to utilize resources that are increasingly less efficient for that specific type of production.