GETEM has two exploration costs: modeling/permitting and drilling costs. The modeling and permitting cost are lump-sum costs of 500,000 2010$ per site for reservoir modeling plus 50,000 2012$ for non-drilling permitting and 125,000 2012$ for exploration drilling permitting. We adopt the GETEM modeling and permitting cost in genGEO and adjust it using the oil & gas support price index, & , to 508,000 2002$, given in Equation S55.