0.38 Victor P. Goldberg John R. Erickson, Quantity and Price Adjustment in Long-Term Contracts: A Case Study of Petroleum Coke, Journal of Law and Economics, 1987.

{ contract contracts contracting contractual }	0.38
{ made make case part }	0.12
{ price prices market retail }	0.07
{ oil sugar domestic quota }	0.06

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