Competition
Competition is a process as well as a market description. Compare sellers' options, buyers' alternatives, and barriers that stop new firms from entering.
Entry and Exit
Objective: Explain entry and exit, distinguish their meanings, and apply them to a described case.
Entry: Entry occurs when a firm begins supplying a market. Exit: Exit occurs when a firm stops supplying a market. Consumer and producer decisions depend on constraints, alternatives, information, and expectations. Accounting quantities must be defined consistently: revenue is not profit, and a past unrecoverable cost differs from a future avoidable cost. Competition can change both prices and product attributes. Use a stated time period and output range when comparing costs, because a cost treated as fixed in one interval may change in another. Application: A new bakery opens in a neighborhood. This most directly illustrates entry. A business leaves an unprofitable product line. This most directly illustrates exit.
Worked examples
Try itOriginal teaching scenario: A new bakery opens in a neighborhood. Which idea from this section does it most directly illustrate?Show answer
Step 1 — Read the observation: A new bakery opens in a neighborhood. Step 2 — Recall the relevant idea: Entry occurs when a firm begins supplying a market. Step 3 — Connect the observation to the idea: The scenario is an illustration of entry. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.
Try itOriginal teaching scenario: A business leaves an unprofitable product line. Which idea from this section does it most directly illustrate?Show answer
Step 1 — Read the observation: A business leaves an unprofitable product line. Step 2 — Recall the relevant idea: Exit occurs when a firm stops supplying a market. Step 3 — Connect the observation to the idea: The scenario is an illustration of exit. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.
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