One is tempted to argue that there should be a defensible study, but the problem is obvious- some private firms undoubtedly base contracts on the judgment of the managers involved.
The judgement of managers is undoubtedly the basis for some contracts.
Contracts are based strictly on empirical evidence that can be verified by outside auditors.
A small person in a blue shirt is standing in front of a group of tires.
A person is skydiving.
Two children are eating a sandwich.
The bird is flying through the air.
A kid is playing in a lake.
Two people watch as a man plays soccer in a large field of grass.