What is a comparative advantage calculator?
A tool that takes two producers’ output of two goods and works out each producer’s opportunity cost, which one has the comparative advantage in each good, which has the absolute advantage, and the range of trade rates where specializing and trading benefits both sides.
What is comparative advantage?
The ability to produce a good at a lower opportunity cost than another producer — not necessarily to produce more of it in absolute terms. A producer has comparative advantage in whichever good it gives up the least of the other good to make.
What is absolute advantage?
Simply producing more of a good than another producer, using the same amount of resource. It’s a comparison of raw output, unlike comparative advantage, which compares opportunity costs.
What’s the difference between absolute and comparative advantage?
Absolute advantage asks "who makes more?" — comparative advantage asks "who gives up less to make it?" A producer can have the absolute advantage in both goods and still not have the comparative advantage in both — in fact it mathematically cannot, since a lower opportunity cost in one good always means a higher opportunity cost in the other, for the same producer.
How do you calculate comparative advantage?
Divide each producer’s output of one good by its output of the other to get the opportunity cost of each good, for each producer. Whichever producer has the lower opportunity cost for a given good has the comparative advantage in it — the calculator above does this from the four output numbers you enter.
How does opportunity cost relate to comparative advantage?
Opportunity cost is what comparative advantage is measured by — not output, not skill, but how much of one good a producer must give up to make one more unit of the other. The Opportunity Cost Calculator covers the general two-choice version of this idea; this page applies it specifically to two producers and two goods to find the basis for trade.
Can one producer have both absolute and comparative advantage?
Yes, in one good — but never in both goods at once. A producer can be absolutely better at making everything, and the calculator’s example shows exactly this case, yet comparative advantage still splits between the two producers because opportunity costs are always mirror images of each other for the same producer. This is the central, often counterintuitive result of the model: even the most productive economy still gains from specializing and trading.
What is a mutually beneficial trade rate?
Any trade rate strictly between the two producers’ opportunity costs for the traded good. Inside that range, both sides pay less through trade than they would to produce the good themselves — outside it, one side would be better off not trading at all.
What is revealed comparative advantage, and does this calculator compute it?
No — revealed comparative advantage (RCA) is a different, empirical measure used in real trade statistics, comparing a country’s actual export share of a good to that good’s share of world trade. This calculator implements the classical theoretical model (opportunity cost from output figures you supply), not the RCA index, which requires real trade-flow data this tool doesn’t use.
Should I use this or the Opportunity Cost Calculator?
Use the Opportunity Cost Calculator for a single decision-maker choosing between two options. Use this page when you’re comparing two separate producers and asking whether specialization and trade between them makes both better off — the same underlying idea, applied to trade instead of a single choice.