For example, here is the OECD empirical work on the deadweight costs of various forms of tax.

FORBES: I Must Apologise For One Of My Fellow Englishmen: Simon Tilford In The New York Times

The concept of clusters is now well understood and empirical work on their incidence and impact is growing rapidly.

ECONOMIST: The West Lothian question

Empirical work tells us that we would expect to see substantial effects when the minimum wage is more than 50% of the mean wage.

FORBES: The Effect of the Minimum Wage on Youth Unemployment

There is no empirical evidence that this would hit investment or work incentives.

FORBES: I Must Apologise For One Of My Fellow Englishmen: Simon Tilford In The New York Times

As a practical prescription for improving the economy, the empirical evidence is clear in my view that discretionary Keynesian policy does not work and the experience of the past three years confirms this view.

FORBES: Keynes the Way Keynes Said We Should Do Keynes

My company LRN conducted an independent statistical analysis of how things actually work at companies, small and large, derived from a lengthy and rigorous empirical study of observations from 36, 000 employees in 18 countries conducted by the Boston Research Group, The Center for Effective Organizations at University of Southern California and Research Data Technology, Inc.

FORBES: (Almost) Everything We Think About Employee Engagement is Wrong