After paying $1.00, you are allowed to open a newspaper vending machine (i.e. get as many as you want, theoretically). In contrast, a soft drink vending machine only drops one can after you pay the same amount of money.After paying $1.00, you are allowed to open a newspaper vending machine (i.e. get as many as you want, theoretically). In contrast, a soft drink vending machine only drops one can after you pay the same amount of money. Why? Please explain the difference in the language of economics.