Economists build their precise models using the assumption that people always act rationally.

To do this, we must have in our heads a precise but flexible model of how people move.

Only intensive experiment can permit a more precise model.

It was based on precise models developed ages ago by human composers.

However, a precise model of how genes came in close proximity is still lacking.

But Western officials said the precise model of aircraft that would be covered by the new, more comprehensive limits was not clear.

General Wallace said that he did not have a precise model in mind for the attack he is planning.

After Mill, there was a shift in economic theory, which emphasized a more precise and theoretical model of competition.

"I don't have a precise model that I follow for every film," he said.

In order to do this, precise mathematical models are required.