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M. Daniel Westbrook, Patricia A. Buckley, Flexible Functional Forms and Regularity: Assessing the Competitive Relationship between Truck and Rail Transportation, The Review of Economics and Statistics, Vol. 72, No. 4 (Nov., 1990), pp. 623-630
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Stored only when both papers are in the corpus — 24 citations exist upstream.
Papers that cite the same references — the relational fallback while embeddings are still backfilling.
Imported from OpenAlex (CC0) — nothing here is generated.