International trade theory implies that international trade is beneficial to all trading countries. ...

International trade theory implies that international trade is beneficial to all trading countries. However, casual observation leads to the conclusion that official obstruction of international trade flows is widespread.
 
  How might you reconcile these two facts?

---

Question 2 - If country A has a larger trade triangle than country B, reciprocal demand will lead to an increase in the relative price of A's imports.
 
  Indicate whether the statement is true or false

---

Question 3 - If a scale economy is the dominant technological factor defining or establishing comparative advantage, then the underlying facts explaining why a particular country dominates world markets in some product may be pure chance, or historical accident.
 
  Explain, and compare this with the answer you would give for the Heckscher-Ohlin model of comparative advantage.