Is there a way to get your license at 15 instead of 16 in the United States if your states requirement is 16?

no, because it's a law, you must be 16

i think it can have both positive and negative effects on businesses.

for example:

lets say you own a small business and taxes go up 4% that means it is going to cost your business more money to buy product to sell. but at the same time you make more money from the tax rise.

that is my theory.