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Reilly's Law of Retail Gravitation/Evidence
Method evidence record

Reilly's Law of Retail Gravitation

Reilly's law of retail gravitation is a deterministic model that predicts how an intermediate town's retail trade divides between two larger competing cities. Formulated by William J. Reilly in 1931 by analogy with Newtonian gravity, it states that each city attracts trade in direct proportion to its population and in inverse proportion to the square of the distance to it. Solving for the point of equal attraction yields the famous breaking point — the boundary along the route between two cities where their trade areas meet.

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Citations copied verbatim from the method’s source record. No claim-level verification is inferred from them.

Reilly's Law of Retail Gravitation (Breaking-Point Model)
Taxonomic method record · regression-model / human-geography
  • Reilly, W. J. (1931). The Law of Retail Gravitation. Knickerbocker Press, New York. · URL
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Related methods

Generated from the method graph and shown as machine-suggested relations — no evidence claim is inferred.

Used in the same domainAccessibility Analysismachine-suggested · Relational suggestion, not evidence.Used in the same domainCentral Place Analysismachine-suggested · Relational suggestion, not evidence.Same method familyGravity Model of Migrationmachine-suggested · Relational suggestion, not evidence.Same method familyHuff Modelmachine-suggested · Relational suggestion, not evidence.

Evidence status

Sources recorded, not reviewed

Bibliographic sources are present. Claim-level evidence review has not been performed.

Sources

1 recorded citation, copied from the method source record.

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