; and (viii) other service providers that contract with any of the entities described in clauses (i) through (vii) that may use price-related compensation and payment structures, such as rebate aggregators (or other entities that negotiate or process price concessions on behalf of pharmacy benefit managers, plan sponsors, or pharmacies). (B) The primary business models and compensation structures for each category of intermediary described in subparagraph (A). (C) Variation in price-related compensation structures between affiliated entities (such as entities with common ownership, either full or partial, and subsidiary relationships) and unaffiliated entities. (D) Potential conflicts of interest among contracting entities related to the use of prescription drug price-related compensation structures, such as the potential for fees or other payments set as a percentage of a prescription drug’s price to advantage formulary selection, distribution, or purchasing of prescription drugs with higher prices. (E) Notable differences, if any, in the use and level of price-based compensation structures over time and between different market segments, such as under this part and the Medicaid program under title XIX. (F) The effects of drug price-related compensation structures and alternative compensation structures on Federal health care programs and program beneficiaries, including with respect to cost-sharing, premiums, Federal outlays, biosimilar and generic drug adoption and utilization, drug shortage risks, and the potential for fees set as a percentage of a drug’s price to advantage the formulary selection, distribution, or purchasing of drugs with higher prices. (G) Other issues determined to be relevant and appropriate by the Comptroller General. (2) Report Not later than 2 years after the date of enactment of this subsection, the Comptroller General shall submit to Congress a report containing the results of the study conducted under paragraph (1), together with recommendations for such legislation and