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1
Rail Costs and Capital Adjustments in a Quasi-Regulated Env..
NBER working paper series, no. w3841
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2
Mergers, Deregulation and Cost Savings in the U.S. Rail Ind..
NBER working paper series, no. w3749
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3
Interdependent Pricing and Markup Behavior: An Empirical An..
NBER working paper series, no. w3396