According to the theory of comparative advantage, a country should produce and

comparative advantage, economic theory, first developed by 19th-century British economist David Ricardo, that attributed the cause and benefits of international trade to the differences in the relative opportunity costs (costs in terms of other goods given up) of producing the same commodities among countries. In Ricardo’s theory, which was based on the labour theory of value (in effect, making labour the only factor of production), the fact that one country could produce everything more efficiently than another was not an argument against international trade.

In a simplified example involving two countries and two goods, if country A must give up three units of good x for every unit of good y produced, and country B must give up only two units of good x for every unit of good y, both countries would benefit if country B specialized in the production of y and country A specialized in the production of x. B could then exchange one unit of y for between two and three units of x (before trade, country B would have only two units of x), and A could receive between one-third and one-half units of y (before trade, country A would have only one-third unit of y) for every unit of x. This is true even though B may be absolutely less efficient than A in the production of both commodities.

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The theory of comparative advantage provides a strong argument in favour of free trade and specialization among countries. The issue becomes much more complex, however, as the theory’s simplifying assumptions—a single factor of production, a given stock of resources, full employment, and a balanced exchange of goods—are replaced by more-realistic parameters.

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Comparative advantage is the ability of a country to produce a good or service for a lower opportunity cost than other countries.

Opportunity cost measures a trade-off. A nation with a comparative advantage makes the trade-off worthwhile. This means the benefits of buying its good or service outweigh the disadvantages. The country may not be the best at producing something, but the good or service has a low opportunity cost for other countries to import.

This economic theory was developed by David Ricardo. It was originally applied to international trade, but it can be applied to any level of business.

Definition and Examples of Comparative Advantage

Comparative advantage is what you do best while also giving up the least. For example, if you’re a great plumber and a great babysitter, your comparative advantage is plumbing.

This is because you’ll make more money as a plumber because an hour of babysitting services costs far less than you would make doing an hour of plumbing. The opportunity cost of babysitting, on the other hand, is high. Every hour you spend babysitting is an hour’s worth of lost revenue you could have gotten on a plumbing job.  

If you are better than everyone else in the neighborhood at both plumbing and babysitting, you have absolute advantage in both fields. But plumbing is your comparative advantage. That's because you only give up low-cost babysitting jobs to pursue your well-paid plumbing career.

How Comparative Advantage Works

In international trade, countries usually have comparative advantage in different industries and for different reasons. These can be related to natural resources, workers, government investment, or other factors. Countries then trade based on these advantages.

Oil-producing nations, for example, have a comparative advantage in chemicals. Their locally-produced oil provides a cheap source of material for the chemicals when compared to countries without it. A lot of the raw ingredients are produced in the oil distillery process. As a result, Saudi Arabia, Kuwait, and Mexico became competitive with U.S. chemical production firms in the early 1980s. Their chemicals are inexpensive, making their opportunity cost low. 

Another example is India's call centers. U.S. companies buy this service because it is cheaper than locating the call center in America. Some companies may have customers who experience miscommunications due to language barriers when they're speaking with representatives at Indian call centers. But the call centers provide the service cheaply enough to make the trade-off worth it for the businesses that hire them. 

One factor in America's comparative advantages is its vast landmass bordered by two oceans. It also has lots of fresh water, arable land, and available oil. U.S. businesses benefit from cheap natural resources and protection from a land invasion. Most important, the country has a diverse population with a common language and national laws. The diverse population provides an extensive test market for new products. It helped the United States excel in producing consumer products.

Diversity also helped the United States become a global leader in banking, aerospace, defense equipment, and technology. Silicon Valley harnessed the power of diversity to become a leader in innovative thinking. Those combined advantages created the power of the U.S. economy.

Note

Investment in human capital is critical to maintaining a comparative advantage in the knowledge-based global economy.

In the past, comparative advantages occurred more in goods and rarely in services. That's because products are easier to export. But telecommunication technologies like the internet are making services easier to export. Those services include call centers, banking, and entertainment.

Who Developed the Theory of Comparative Advantage?

The concept of comparative advantage was developed in the early 1800s by the economist David Ricardo. He argued that a country boosts its economic growth the most by focusing on the industry in which it has the most substantial comparative advantage. 

For example, at the time, England was able to manufacture cheap cloth. Portugal had the right conditions to make cheap wine. As a result, Ricardo predicted that England would stop making wine and that Portugal would stop making cloth. Instead, he suggested, they would trade with each other for the product that they were less efficient at producing.

He was right. England made more money by trading its cloth for Portugal's wine, and vice versa. It would have cost England a lot to make all the wine it needed because it lacked the correct climate to grow grapes efficiently. Portugal, on the other hand, didn't have the manufacturing ability to make cheap cloth. Both countries benefited economically by exporting what they could produce most efficiently and importing what they couldn't produce as easily.

Note

The theory of comparative advantage became the rationale for free trade agreements.

Ricardo developed his approach to combat trade restrictions on imported wheat in England. He argued that it made no sense to restrict low-cost and high-quality wheat from countries with the right climate and soil conditions. England would receive more value by exporting products that required skilled labor and machinery. It could acquire more wheat in trade than it could grow on its own. 

David Ricardo started out as a successful stockbroker, making $100 million in today's dollars. After reading Adam Smith’s The Wealth of Nations, he became an economist. He pointed out that significant increases in the money supply created inflation in England in 1809. This theory is known as "monetarism." 

Ricardo also developed the law of diminishing marginal returns. That’s one of the essential concepts in microeconomics. It states that there is a point in production where the increased output is no longer worth the additional input in raw materials. 

How Comparative Advantage Affects International Trade

The theory of comparative advantage argues that trade protectionism doesn't work over time. Political leaders are always under pressure from their local constituents to protect jobs from international competition by raising tariffs. But that’s only a temporary fix.

In the long run, trade protectionism hurts the nation's competitiveness because it isn't efficient. It allows the country to waste resources on unsuccessful industries. It also forces consumers to pay higher prices to buy domestic goods.

Comparative Advantage vs. Absolute Advantage

Absolute advantage is anything a country does more efficiently than other countries. Nations that are blessed with an abundance of farmland, fresh water, and oil reserves have an absolute advantage in agriculture, gasoline, and petrochemicals. 

Just because a country has an absolute advantage in an industry, though, doesn't mean that it will be its comparative advantage. That depends on what the trading opportunity costs are. Suppose its neighbor has no oil but lots of farmland and fresh water. The neighbor is willing to trade a lot of food in exchange for oil. Now the first country has a comparative advantage in oil. It can get more food from its neighbor by trading it for oil than it could produce on its own. 

Comparative Advantage vs. Competitive Advantage

Competitive advantage is what a country, business, or individual does that provides a better value to consumers than its competitors. There are three strategies companies use to gain a competitive advantage. First, they could be the low-cost provider. Second, they could offer a better product or service. Third, they could focus on one type of customer. 

Competitive advantage is what makes you more attractive to consumers than your competitors. For example, you might be highly in demand to provide plumbing services, even though there are other plumbers available who are just as good or better. It could be because you charge less. This gives you a competitive advantage.

How To Calculate Comparative Advantage

To find comparative advantage for a specific good or service, compare the opportunity cost of producing that same good or service between two businesses or countries.

  Factory A Factory B Tables300900Chairs 10001005

Say Factory A and Factory B both produce chairs and tables. In a single week, Factory A can produce either 300 tables or 1000 chairs. In the same week, Factory B can produce either 900 tables or 1005 chairs.

Factory B has absolute advantage in both chairs and tables because it can produce more of each in the same amount of time. However, it has a far greater comparative advantage in tables because it can produce three times the number of tables as Factory A can for the same time cost. Factory B should focus its resources on making and trading tables, leaving Factory A to produce chairs.

Key Takeaways

• A country with comparative advantage will focus its capital, labor, and natural resources on producing goods and services with lower opportunity costs and higher profit margins. 
• David Ricardo, a 19th-century economist, developed the concept of comparative advantage to end tariffs on wheat imports in England.
• A country may have an absolute or competitive advantage over another, but it will often choose to focus on the production of goods where it has comparative advantage.
• Trade protectionism shields inefficient industries, which goes against the concept of comparative advantage.
  

Frequently Asked Questions (FAQs)

How does comparative advantage benefit developing nations?

Developing nations tend to have much lower labor costs than industrialized nations, so that gives them a comparative advantage in many labor-intensive industries, such as construction and manufacturing.

How does comparative advantage benefit the United States?

The U.S. has a comparative advantage in producing a number of goods and services, especially when it comes to financial markets. Where it does not have a comparative advantage, it benefits by paying less for those goods and services through trade than it would cost to produce them domestically.

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Sources

The Balance uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

1. BC Open Textbooks. "Principles of Economics: 33.1 Absolute and Comparative Advantage."

2. U.S. Bureau of Labor Statistics. “Robust Growth and the Strong Dollar Set Pattern for 1983 Import and Export Prices,” Page 12.

3. National Bureau of Economic Research. "Diversity and Trade," Page 1-2.

4. The Library of Economics and Liberty. “Comparative Advantage.”

5. David Ricardo. "On the Principles of Political Economy and Taxation," Pages 157-170. John Murray, 1817.

6. The University of Texas at Austin College of Liberal Arts. "An Essay on the Influence of a Low Price of Corn on the Profits of Stock; Shewing the Inexpediency of Restrictions on Importation: With Remarks on Mr. Malthus' Two Last Publications: An Inquiry into the Nature and Progress of Rent; and The Grounds of an Opinion on the Policy of Restricting the Importation of Foreign Corn."

   When a country has a comparative advantage it can produce?

   In economic terms, a country has a comparative advantage when it can produce at a lower opportunity cost than that of trade partners. While a country cannot have a comparative advantage in all goods and services, it can have an absolute advantage in producing all goods.

   What does the theory of comparative advantage say?

   Key Takeaways Comparative advantage is an economy's ability to produce a particular good or service at a lower opportunity cost than its trading partners. The theory of comparative advantage introduces opportunity cost as a factor for analysis in choosing between different options for production.

   What is the theory of comparative advantage quizlet?

   The theory of comparative advantage states that under certain conditions, countries can benefit from specialization in the production of goods and services which they have comparative advantage in and trade them for goods and services which they do not have comparative advantage in.

   When a country has a comparative advantage in the production of a good quizlet?

   A country has comparative advantage in the production of a good if it can produce that good at a lower opportunity cost relative to another country. the difference between the opportunity cost of producing the product domestically versus the cost of purchasing the product from another country receives from trade.