Round One: No Specialisation or Trade

	Country A _____________	Country B _____________	Total
Stars
Triangles

Total World Output = _____________

Opportunity Cost and Comparative Advantage

Country A _____________

Opportunity Cost = Sacrifice/Gain

Opportunity Cost: Stars: Triangles _____________
Opportunity Cost: Triangles: Stars _____________

Country B _____________

Opportunity Cost: Stars: Triangles _____________
Opportunity Cost: Triangles: Stars _____________

Therefore:

Comparative advantage in triangles = _____________
Comparative advantage in stars = _____________

Round Two: Specialisation and Trade

	Country A _____________	Country B _____________	Total
Stars
Triangles

Total World Output = _____________

Increase in World Output = _____________

Terms of Trade

_____________ Stars = _____________ Triangles

Country A Gain = _____________
Country B Gain = _____________