It remains an empirical issue to track the time-course of the constraints uncovered in the present experiment.

(Elsewhere, they refer to the "intense political contestation over empirical issues on which technical experts largely agree.")

This journal publishes papers covering in applied economics, primarily on empirical microeconomic issues.

In fact this is an empirical issue - are taxes paid out of private savings or current consumption?

Therefore, the relationship between volatility and maturity is an empirical issue (Anderson and Danthine, 1983).

"The empirical issue is how would you recognize a class when you saw one," Professor Kingston said in an interview.

Airlocks: A discussion of the empirical and theoretical issues relating to valve parachutes.

The integration of theoretical and empirical issues, and historically based research are, however, distinctive features of sociology at this University.

Formal and empirical issues in optimality theory.

His multidisciplinary work grounds empirical historical issues in philosophical questions.