On what empirical evidence this is based, the article doesn't say.
The empirical evidence for this is the world's economy today and its history.
We therefore leave this as an open question, to be decided by empirical evidence.
Empirical evidence does not always provide much support for the Lewis model.
It may work but all the empirical evidence says otherwise.
And I have empirical evidence to back up this claim.
Empirical evidence to support either point of view is lacking.
I don't have the statistics in front of me, but the empirical evidence seems to be pretty strong.
And certainly there is a good deal of empirical evidence to show also that it would be successful.
There is very little empirical evidence available to support these methods.
