who pays for most of the scientific research done in the united states
Funding of science The US spent $456.1 billion for research and development (R&D) in 2013, the most recent year for which such figures are available, according to the National Science Foundation. The private sector accounted for $322.5 billion, or 71%, of total national expenditures, with universities and colleges spending $64.7 billion, or 14%, in second place.[4]
Scientific control A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable.[1] This increases the reliability of the results, often through a comparison between control measurements and the other measurements. Scientific controls are a part of the scientific method.