You say 'without much reducing employment'. So right there you admit that it does reduce employment, thereby proving the point.
Saying Wenzel is oversimplifying is like saying Newton was oversimplifying the concept of gravity.
You don't need empirical studies, which are done specifically to try to show direct causation, to prove or disprove logic.
Price controls and gravity both have real, known properties. No "studies" that attempt to prove or disprove either will change anything.
*Advancing the Ideas of Liberty Daily*