(Providence, RI)--Rhode Island Republicans want to see an independent study on the proposed lottery contract extension for IGT and a counter-proposal from Twin River.House Republican Finance Committee members called for the study yesterday.The key disputed issues, according to the GOP, include whether the proposed IGT contract includes a premium on services as a subsidy to keep jobs in the state and the performance of IGT video lottery terminals versus their competitors at the casinos in Lincoln and Tiverton.