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[Joseph_E._Stiglitz,_Carl_E._Walsh]_Economics(Bookos.org) (1)

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has a comparative advantage in fine lace; its workers have developed the requisite

skills. A quirk of fate might have led Belgium to acquire a comparative advantage

in watches and Switzerland in lace.

Specialization Earlier we saw how comparative advantage leads to specialization.

Specialization may also lead to comparative advantage. The Swiss make fine

watches, and have a comparative advantage in that market because of years of

unique experience. Such superior knowledge, however, does not explain why Britain,

Germany, and the United States, which are at roughly the same level of technological

expertise in building cars, all trade cars with one another. How can each country

have a comparative advantage in making cars? The answer lies in specialization.

Both Britain and Germany may be better off if Britain specializes in producing

sports cars and Germany in producing luxury cars, or the converse, because

specialization increases productivity. Countries enhance, or simply develop, a comparative

advantage by specializing just as individuals do. As a result, similar countries

enjoy the advantages of specialization even when they specialize in different

variations of products that are fundamentally similar.

Interactions The different sources of comparative advantage can serve to reinforce

each other. Pittsburgh provides a good example of some of these interactions.

Its rivers and deposits of bituminous coal (natural endownments) gave it an

early comparative advantage as a location for industries such as steel production.

George Westinghouse, founder of the corporation that bears his name, came to

Pittsburgh because he needed steel for a tool he had designed to get derailed train

cars back onto their tracks, and he could take advantage of Pittsburgh’s established

steel industry. Carnegie Technical Schools, the ancestor of today’s Carnegie

Mellon University, was created to help supply the area’s industries with the engineers

they needed. The availability of engineers (acquired endowments) made

Pittsburgh an attractive place for other industries to locate.

Wrap-Up

THE FIVE BASES OF COMPARATIVE ADVANTAGE

Natural endowments, which consist of geographical determinants such as land,

natural resources, and climate

Acquired endowments, which are the physical capital and human skills a nation

has developed

Superior knowledge, including technological advantages, which may be acquired

either as an accident of history or through deliberate policies

Specialization, which may create comparative advantages between countries that

are similar in all other respects

Interactions, which reinforce the other sources of comparative advantage

COMPARATIVE ADVANTAGE ∂ 431

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