title: Improving the PPI sample for prescription pharmaceuticals.
authors.affiliation: Bureau of Labor Statistics, USA.
authors.forename: G G
authors.initials: GG
authors.lastname: Kelly
mesh_terms: D003625:Data Collection; D017277:Drug Approval; D016527:Drug Costs / Q000145:classification / Q000706:statistics & numerical data / Q000639:trends*; D004345:Drug Industry / Q000191:economics*; D011307:Drug Prescriptions / Q000191:economics; D016568:Drugs, Generic / Q000191:economics; D004465:Economic Competition; D008329:Managed Care Programs / Q000191:economics; D004366:Nonprescription Drugs / Q000191:economics; D013997:Time Factors; D014481:United States; D014486:United States Food and Drug Administration