Yet their own lives call into question a key assumption of economic theory.

The validity of this key assumption has not been proven.

This dramatic difference in views results primarily from two key assumptions.

This estimate is based on a number of key assumptions:

Fogel makes several key assumptions and decisions in his analysis.

The key assumption was large-scale participation by civilians in the defense of Japan.

Two key assumptions limit the effectiveness of the credit market in the model.

A key assumption is that the players are impatient.

Two key assumptions lie behind the senior chief inspector and myself arriving at the figure of 175.

A key assumption of the Act was an unemployment rate of 4.6%.