"There is no evidence that increases in the minimum wage have any effect on employment and the author fails to cite the study he mentions."
A student of first year Economics is taught that increases in labor costs result in a fall in total employment. Also that managers make choices between labor and capital, so when the price of one increases, money flows to the other. 
When I raise these points with certain individuals they cry "propaganda". Just like when you discuss climate change with other individuals and they say the science is also "propaganda". 
So you want a study? Pick up a first year Economics text book.