title: Brookings and AEI: testing grounds for "shadow cabinets" and policy ideas.
mesh_terms: D000047:Academies and Institutes / Q000458:organization & administration*; D003695:Delivery of Health Care / Q000191:economics* / Q000331:legislation & jurisprudence; D004219:District of Columbia; D011057:Politics; D011640:Public Policy; D012109:Research Support as Topic; D014481:United States