Selective contracting in Silicon Valley.
D002140:California; D003284:Contract Services / Q000191:economics*; D003365:Costs and Cost Analysis; D005376:Financial Management / Q000191:economics*; D006264:Health Benefit Plans, Employee / Q000458:organization & administration*; D006739:Hospital Administration; D007221:Industry; D007348:Insurance, Health / Q000458:organization & administration*; D011243:Preferred Provider Organizations / Q000458:organization & administration*