The reasons that supply-side proponents are in favor of deregulation include:
- Reduced per-unit costs and shift of aggregate supply curve to the right
- Increased efficiency
- Reduced paperwork associated with complex regulations
The statement "Reduced per-unit costs and shift of aggregate supply curve to the left" is not a reason in favor of deregulation, as supply-side proponents advocate for policies that enhance supply, typically shifting the aggregate supply curve to the right rather than to the left.