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Economics: Scarcity & Productive Efficiency

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Full lesson including notes, simple definitions, examples, and graphs. Ch 2: • Economic Good • Opportunity Cost • Marginal-Benefit, -Cost, -Revenue • Supply Curve/Marginal Cost Curve • Demand Curve/Marginal Benefit Curve • Production Possibilities Frontier Curve (PPF/PPC) • ...

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  • June 13, 2021
  • 5
  • 2020/2021
  • Class notes
  • Mr. g
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Economics 2: Scarcity & Productive Efficiency
Economics: “The study of how individuals and economies deal with scarcity”
Opportunity cost: The cost of not selecting the next best alternative  Only 1 opportunity cost


Marginal –benefit, -cost, -revenue
Marginal benefit: “Additional benefit associated with a 1-unit increase in activity level”
Marginal cost: “Additional cost associated with a 1-unit increase in activity level”
Example: Kelsee makes 20 johnny cakes; Economist want to know how much profit she
will make from 1 additional (The 21st) johnny cake.


Activity rises = Marginal benefit > Marginal cost
Net benefit rises as activity decreased = Marginal cost > Marginal benefit


Supply curve = Marginal Cost Curve
Individual marginal cost curve: Shows the extra cost
a seller incurs to produce 1 more unit of goods
Market marginal cost curve: Combine individual
marginal cost curves
Example: To supply more rice, more land
Demand curve =
Marginal benefit curve
Individual marginal benefit curve: Shows the extra benefit a
buyer enjoys by consuming 1 more unit of goods
Example: Buyer eats more rice, satisfaction decreases

, Drill for more oil until marginal cost = $100 oil
price
If Marginal cost > $100 = Profit




Production Possibilities Frontier Curve (PPF/PPC)
PPF: show all possible combinations of output that can be produced given
 Illustrates tradeoffs of scarcity
PPF assume:

 Fixed quantity and quality or available resources
 Fixed technology
 Efficient production: “No unemployed/underemployed resources”
3 parts to PFF:

 Under the curve: Underutilizing factors of production/resources (Inefficient)
 On the curve: Maximizing use of factors of production/resources (Efficient)
 Over the curve: Based on current resources, we can’t produce outside the curve
(Unattainable with current resources)
PPF Shifters:

 Change in quantity/quality of resources
 Change in technology
 (Trade)
Example: In 1920 corn & cars, now we can make more because better and more resources and
better technology
Trade can also shift PPF curve:
“Allows countries to consume beyond their production possibilities”
Can get more through trade, can’t produce more


Consumer goods: “Created for direct consumption”  Pizza

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