the social product equals the private product minus the fall in the value of production elsewhere for which no compensation is piad by business. Thus, if 10 units of a factor are used by a business to make a certain product with a value of $105; and the owner of this factor is not compensated for their use, which he is unable to prevent; and these 10 units of the factor would yeild products in their best alternative use worth $100; then, the social product is $105