16 (1 point) Tariffs are essentially _________ on imports or exports at the national level. Question 16 options: rebates discounts taxes indemnities Question 17 (1 point) Inequalities within countries have _____________ since 1970 Question 17 options: increased decreased remained the same disappeared Question 18 (1 point) A low per-capita income inevitably means a low level of human well-being. Question 18 options: True False Question 19 (1 point) Primary commodities are characterized by less flexibility of production than manufactured commodities. Question 19 options: True False Question 20 (1 point) Free trade tends to reduce economic inequalities between countries. Question 20 options: True False