One danger associated with calls for fairness based on reciprocity is that calls for fair trade may be invoked in cases where foreign restrictions on domestic exports do not actually exist

The law of supply says that

a. supply and income are inversely related b. supply follows demand c. quantity supplied equals quantity demanded d. price and quantity supplied are inversely related e. price and quantity supplied are directly related

Simplicity and fruitfulness are virtues when it comes to judging

a. normative economics b. economic models c. positive economics d. consumer sovereignty e. market performance