Answer: Marketopia has a comparative advantage in the production of pies.
Explanation:
The bakery with the comparative advantage in any of the goods is the one that has a lower opportunity cost in making it.
Marketopia.
Opportunity cost of Cookies = 18/30 pies = 0.6 pies
Opportunity cost of pies = 30/18 pies = 1.67 cookies
Econladia
Opportunity cost of Cookies = 9/90 pies = 0.1 pies
Opportunity cost of pies = 90/9 pies = 10 cookies
It is shown that Marketopia has a comparative advantage in the production of pies because the opportunity cost of such is 1.67 cookies as opposed to Econladia which is 10 cookies.