Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of facts and evidence.

John Adams

When discussing the historic North American Free Trade Agreement of 1993 (NAFTA), the New York Times said:

Abundant evidence is emerging that jobs are shifting across borders too rapidly to declare the United States a job winner or a job loser from the trade agreement.

Posing the issue in these terms committed the central fallacy in many discussions of international trade — assuming that one country must be a “loser” if the other country is a “winner.” But international trade is not a zero-sum contest. Both sides must gain or it would make no sense to continue trading. Nor is it necessary for experts or government officials to determine whether both sides are gaining. Most international trade, like most domestic trade, is done by millions of individuals, each of whom can determine whether the item purchased is worth what it cost and is preferable to what is available from others.

As for jobs, before the NAFTA free-trade agreement among the United States, Canada, and Mexico went into effect, there were dire predictions of “a giant sucking sound” as jobs would be sucked out of the United States to Mexico because of Mexico's lower wage rates. In reality, the number of American jobs increased after the agreement and the unemployment rate in the United States fell over the next seven years from more than seven percent down to four percent, the lowest level seen in decades. In Canada, the unemployment rate fell from 11 percent to 7 percent over the same seven years.

Why was what happened so radically different from what was predicted? Let's go back to square one. What happens when a given country, in isolation, becomes more prosperous? It tends to buy more because it has more to buy with. And what happens when it buys more? There are more jobs created for workers producing the additional goods and services.

Make that two countries and the principle remains the same. Indeed, make it any number of countries and the principle remains the same. Rising prosperity usually means rising employment.

There is no fixed number of jobs that countries must fight over. When countries become more prosperous, they all tend to create more jobs. The only question is whether international trade tends to make countries more prosperous.

Mexico was considered to be the main threat to take jobs away from the United States when trade barriers were lowered.

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