... production expenditures and ad valorem and windfall profits taxes arefrom ’s Survey of Oil and Gas Expenditures() and, for –, the Census Bureau’s An-nual Survey of Oil and Gas (). ... estimatesof metals for –; and tables .–. presentestimates of other minerals for –.Conceptual and Methodological Issues In addressing conceptual and methodological issues for mineral resources, ... input-output and regional accounts.. See, for example, Gavin Wright [] and Michael J. Boskin, Marc S.Robinson, Terrance O’Reilly, and Praveen Kumar [].The conceptual and methodological issues...