Further empirical work along these lines might be difficult.

However, there has not been a comparable level of empirical work.

Large-scale empirical work which is intended to provide new information based on reliable data.

Waiting to present empirical work until later stages of the investigation is not as productive.

However, there seems to have been little empirical work done on such courses.

Kaufman's empirical work has focused on a few different key areas.

Some recent empirical work on options prices supports this model.

"People who do this kind of empirical work are very unlikely to get an offer from us."

The ambiguity of the empirical work and research does little to resolve matters.

It produced a substantial body of both theoretical and empirical work.