Tariffs and the Law of Increasing Opportunity Cost

See Why Do Domestic Prices Rise With Tarriffs? by Alex Tabarrok. 

He explains that after tariffs drive up the price of imports, American firms that try to expand their output run into the Law of Increasing Opportunity Cost. They have to add resources to their production but those resources won't be as well suited to making their good as the ones they were already using. This raises the cost per unit of making the good and so prices have to rise to cover this. 

More on the Law of Increasing Opportunity Cost and how it works with a simple numerical example after this excerpt from Tabarrok's article:

"Suppose we tax imports of French and Italian wine. As a result, demand for California wine rises, and producers in Napa and Sonoma expand production to meet it. Here’s the key point: Expanding production without increasing costs is difficult, especially so for any big expansion in normal times.

To produce more, wine producers in Napa and Sonoma need more land. But the most productive, cost-effective land is already in use. Expansion forces producers onto less suitable land—land that’s either less productive for wine or more valuable for other purposes. Wine production competes with the production of olive oil, dairy and artisanal cheeses, heirloom vegetables, livestock, housing, tourism, and even geothermal energy (in Sonoma). Thus, as wine production expands, costs increases because opportunity costs increase. As wine production expands the price we pay is less production of other goods and services.

Thus, the fundamental reason domestic prices rise with tariffs is that expanding production must displace other high-value uses. The higher money cost reflects the opportunity cost—the value of the goods society forgoes, like olive oil and cheese, to produce more wine."

Related posts:

Magnets and the Law of Increasing Opportunity Cost (2024)

EV-Battery Plants and the Law of Increasing Opportunity Cost (2023)

Monoclonal-antibody drugs and the law of increasing opportunity cost (2021)

Flushing out the true cause of the global toilet paper shortage amid coronavirus pandemic (2020)

Ventilators and the law of increasing opportunity cost (2020)

Hand sanitizer and the law of increasing opportunity cost (2020)

Here are some basic terms that economists use to discuss this issue:

Opportunity Cost-The value of the best foregone alternative. There is no such thing as a free lunch. If we want to build one more skyscraper, we may have to give up one submarine, since there may not be enough steel to go around (steel is scarce!).

The law of increasing opportunity cost-As more of a particular good is produced, the opportunity cost of its production rises. Why is the law of increasing opportunity cost true? Different resources are better suited to different productive activities. This is just about the same as saying people have different abilities, like some are more entrepreneurial and some are more bureaucratic.

Let’s assume that we have society with five workers who can make either of two goods, candles or shoes. Now the best candle maker will not necessarily be the best shoemaker and some candle makers will be better than others. This simply means that workers have different abilities.

In the real world, the best doctor would not be the best lawyer. Some plumbers are better than others.

In the table below, the number of candles OR shoes that each worker can make in a day is listed.

Worker	Candles	Shoes
I	7	3
II	6	4
III	5	5
IV	4	6
V	3	7

Again, the workers have different abilities, just as they do in the real world.

What are all of the combinations of candles and shoes that this society can make? If all the workers make candles, they can make 25 (just add up how much each worker can make). How many shoes? ZERO, since each worker spends all day in the candle factory (this is combination A in the table below).

If we want to make some shoes, the first worker we would tell to stop making candles, if we are rational and trying to get the best deal, would be worker V.  So we gain 7 shoes and lose 3 candles. That is why combination A is 22 and 7. Worker V no longer makes candles since they are making shoes. So the opportunity cost of making a shoe is some number of candles (and vice-versa).

The rest of the combinations that show what would happen if we kept moving workers out of candle making and into shoe making is in the table below.

Combination	Candles	Shoes
A	25	0
B	22	7
C	18	13
D	13	18
E	7	22
F	0	25

Now what happens to the opportunity cost as we move from combination A to combination B? Then combination B to combination C, and so on? The table below shows this:

Change	Candles Given Up	Shoes Gained	Candles per Shoe
A to B	3	7	0.429
B to C	4	6	0.667
C to D	5	5	1.000
D to E	6	4	1.500
E to F	7	3	2.333

By moving from point A to point B, we give up 3 candles to gain 7 shoes. The cost of each shoe in candles is .429 (3/7). Then we give up 4 candles to get 6 shoes, with each shoe costing .667 candles. The more shoes we try to produce, the more candles that have to be given up to get each shoe. So the opportunity cost of producing shoes rises.

This is called the law of increasing opportunity cost.

The law of increasing opportunity cost-As more of a particular good is produced, the opportunity cost of its production rises. (see how the numbers rise in the “Candles per Shoe” column in the table above)

Why is the law of increasing opportunity cost true? Different resources are better suited to different productive activities. This is just about the same as saying people have different abilities, which is what we see in the number of candles and shoes each worker can make.