Shortage — Social Studies definition

Excess quantity demanded over quantity supplied at a stated price.

Where it is taught

In use

A shortage at a stated price means demand exceeds supply; a surplus means supply exceeds demand.

Supply, Demand, Equilibrium & Market Changes

Questions using shortage

Problem 1

What does a 40-unit shortage at $2 mean in this model?
Answer and explanation

Quantity demanded is 60 units and supplied is 20, so demand exceeds supply by 40 units per week at that price. It does not mean 40 additional units already exist or establish how an actual market would allocate the available 20.

Problem 2

What further questions follow a model prediction of shortage?
Answer and explanation

Investigate allocation, enforcement, contracts, later supply responses, quality, and other provision. The numerical gap describes plans at a price under assumptions; it does not establish every real consequence or one automatic policy judgment.

Problem 3

Invented weekly schedule: prices $1–$5; original demand 80,60,40,20,0; supply 0,20,40,60,80. Demand then rises by 40 at every price. Identify both equilibria and a shortage at the original $3 after the shift.
Answer and explanation

Originally, $3 and 40 units equate supply and demand. After the shift, demand at $3 is 80 while supply remains 40, a shortage of 40. At $4, both are 60, so the new listed equilibrium is $4 and 60 units. The prediction holds within this supplied model; it does not establish the cause of an actual market change or instant adjustment.

Find equality in the original schedule.

Add 40 to demand rows.

Compare quantities at $3 and $4.

Response criteria

  • Explain the relevant institution or economic concept accurately; show correct calculations where needed.
  • Connect supplied evidence and stated assumptions to an explained conclusion.
  • Compare feasible options and their effects on different people without stereotypes.
  • Identify a limitation, tradeoff, uncertainty, or condition that qualifies the conclusion.

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