Currently, the U$.$S$.$ Department of Transportation has a rule that allows commercial truck drivers to drive up to a limit of $90$ hours per week; after $40$ hours per week, drivers$$ hourly pay goes up by $50\%.$ A proposed rule would reduce this limit to $60$ hours of driving per week. One supporter of the proposal said this: $$Almost no drivers are choosing to work $90$ hours per week; drivers will welcome the added time away from the job.$$ Suppose that the proposal passes, and a subsequent study shows that after the new limit took effect, the hourly wages of truck drivers rose, other things equal. Using economic theory, comment on this finding in the context of the quotation above. Be sure to discuss if drivers were working more than $60$ by choice or by force.