Verified buyer searches show homes across a river with one distant crossing are rarely considered substitutes because of travel time. Under these documented facts, what role does the river play?
Correct Answer
D) It can be a competitive-market boundary because substitution is weak
Under the stated buyer evidence, the crossing barrier weakens substitution and can help delineate markets. Other river settings may be shared markets or amenities. Do not assume a jurisdictional boundary or a mandatory discount from physical appearance alone.
Why This Is the Correct Answer
Option D is correct because the documented buyer evidence shows weak substitution across the river due to travel time. Since market data should come from the area where buyers would search for comparable substitutes, a barrier that limits that search can help delineate separate competitive markets.
Why the Other Options Are Wrong
Option A: It must unite both banks into one market
Option A, saying the river must unite both banks into one market, is wrong because the search data show buyers rarely consider homes on the other side as substitutes. Nothing requires a river to join areas into a single market.
Option B: It is irrelevant to market delineation, despite the search data
Option B, treating the river as irrelevant despite the search data, is wrong because buyer search behavior is central to market delineation. Ignoring documented evidence of weak substitution would misdefine the market.
Option C: It serves as a jurisdictional boundary between two towns
Option C, calling the river a jurisdictional boundary between two towns, is wrong because nothing in the facts says the river separates jurisdictions. Its role here comes from buyer behavior, not political lines.
Follow the buyer's search
A market ends where buyers stop looking. If buyers rarely cross the river, the river can be the market's edge.
How to use: Use this when a question asks whether a physical feature defines a market area.
Exam Tip
Base market boundaries on evidence of buyer substitution, not on appearance or political lines alone.
Common Mistakes to Avoid
- -Assuming a river is a jurisdictional boundary
- -Ignoring buyer search data when defining the market
- -Applying a fixed discount for being across a river without evidence
Concept Deep Dive
Analysis
This question tests competitive market delineation. A market area is defined by where buyers search for substitutes, so a physical feature matters when it changes buyer behavior. Here verified search data show buyers rarely treat homes across the river as substitutes, so the river can mark a market boundary.
Background Knowledge
Market areas are defined by the principle of substitution: properties compete when buyers see them as reasonable alternatives. Physical barriers such as rivers, highways or rail lines can separate markets, but only when they actually affect how buyers search and choose.
Real-World Application
An appraiser in a river town finds that local agents and buyer search records show families on the east bank rarely look at west-bank homes because the only bridge is miles away. She limits her comparable search to the east bank and explains why in her report.
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