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Tag Archives: law of demand

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Sort of like lunch and parking, there is no such thing as free gas.

Lunch? Even when someone else takes the check, you have sacrificed time or a future payback to that person.

Parking? Time spent looking for a space and unproductive use of valuable urban real estate are 2 costs of free parking.

And now, we can add gasoline to the list.

Although Venezuelans enjoy 4 cents a gallon gasoline and 5.8 cents for premium, they pay in a host of other ways. Starting with oil production, the cost is inefficiency. Low prices mean less revenue that could be used to update facilities and produce more oil. Thinking of the law of demand, when something is cheap, we use more of it, even when its marginal utility plunges. Venezuelans use almost 7 times as much gasoline as neighboring Colombians who pay a market price.

Less tangibly, cheap gas creates perverse incentives. Driving unnecessarily, Venezuelans emit more greenhouse gases. Seeing the opportunity to sell gas to neighboring Colombians, they smuggle. In large, gas guzzling 1970s vehicles with full tanks, “pimpineros” drive across the border. If you pay close to 5 cents and then sell it for $2, depending on how much gas you burn in traffic jams, you can earn $25 a day.

And finally, the distortion takes us to post-Chavez politics. A mainstay of the Hugo Chavez regime, gas subsidies will be tough to eliminate. Any economically savvy candidate who wants to diminish government support and grow the economy will probably be defeated. As a result, the cost of the cheap gas is also wise leadership that will grow GDP (below from WSJ).

Fossil Fuel Subsidy-GDP Cost

Not quite as high as in Venezuela, fossil fuel subsidies that help consumers abound in developing nations. Areas in red indicate the world’s highest fossil fuel subsidy rates, 2009-2011 (based on IEA data).

Areas in red indicate the world's highest fossil fuel subsidy rates.

Fossil Fuel Subsidies based on IEA data from

Any benefits? The WSJ tells us that one 2011 report concluded that Yemeni fossil fuel subsidies diminished their poverty rate by making more money available to spend elsewhere.

Still, whether looking at cost or benefit, fossil fuel subsidies that benefit the consumer will always return us to the law of demand. When price falls, we are willing and able to buy more because we experience a lower opportunity cost.

Sources and Resources: Two excellent articles on fossil fuel subsidies were here, at WSJ.com (the source of my Venezuela facts and the GDP graph above) and here in the Guardian. Complementing the articles, more data and discussion are at the IEA website, in an OECD report (source for map), and at the Institute for Energy Research, my source for the bottom graph. In addition, this interactive map from National Geographic is fascinating and includes supply side subsidies like those in the US. Finally, this econlife post has more on Venezuelan market distortions.

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Peanut prices respond to demand and supply

Last year, we had a peanut shortage. As a result, Skippy raised its prices and Smucker’s removed its reduced-fat creamy peanut butter spread from supermarket shelves.

But now, supply has responded. Predicting a record year, the USDA says the peanut crop will exceed its recent 2008 high of 5.2 billion pounds. The reason? Farmers who had switched to more profitable commodities like cotton returned to peanuts when their prices went up.

As one LA Times blogger said, “Our national nightmare is over.”

And economists will be smiling because the peanut butter story is a perfect example of how incentives affect supply curves.

Sources and Resources: For lots of detail, I recommend this WSJ article and this one from the Chattanooga Free Press while for a smile, here is the LA Times blog. Also, you might enjoy this 1884 patent application for “peanut paste.” Finally, at econlife, here is some background from a past post on the peanut crop.

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The goal is energy conservation. But what is the best way?

During the end of August, our newest fuel economy standards were announced. Now CAFE, our Corporate Average Fuel Economy mandate, is close to 29 miles per gallon. The goal is 35.5 for 2016 and 54.5 miles per gallon by 2025. So auto manufacturers have the incentive to produce hybrids, cars with more efficient gas mileage, electrified vehicles, lighter cars.

This takes us to the “rebound effect.” As we explained in a past Econlife post

“Citing the ‘rebound effect,’ a New Yorker Magazine article introduces us to {an 1865} book called The Coal Question…{which}explains that the energy efficiency created by the steam engine encouraged more energy use rather than less. {19th century economic thinker William} Jevons said, ‘It is wholly a confusion of ideas to suppose that the economical use of fuel is equivalent to a diminished consumption. The very contrary is truth.’”

What really makes us conserve? The law of demand. When prices rise, we are willing and able to buy less.

Or, as financial journalist Eduardo Porter explains, gas taxes are much better than CAFE because they make us drive less. Porter then describes what happens next, “When time came to replace the old family S.U.V., we would be more likely to consider a more fuel-efficient option. As more Americans sought gas-sipping hybrids, carmakers would develop more efficient vehicles.” For example, In the UK where the gas tax is $3.95 a gallon, Ford’s compact Fiesta goes 72 miles on a gallon. In the US, the number for the Fiesta is 33 MPG.

But, will you vote for a politician that supports higher taxes?

Sources and Resources: For the source of my Porter quote and much more detail on the cost benefit tradeoff between CAFE and gas taxes, this Porter article is excellent as is this New Yorker article that discusses the “rebound effect.” In addition, the specifics of CAFE standards are described further by the NY Times and an NHTSA press release.

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Industries afflicted with Baumol's Disease have slower productivity growth.

A village in Cambodia had problems with affordable health care but they found a solution.

Traditionally,  if someone got sick, the gods had to be appeased with an offering that might include a buffalo, a cow, some bananas, incense, rice wine, a chicken. It was expensive–nearly $500 US dollars. But their religion, a mixture of animism and Theravada Buddhism, said healing meant sacrifice.

Maybe this is where the law of demand enters the picture. With the arrival of evangelical Christian missionaries came a cheaper health care solution. As one resident said, “…If I did not believe in Jesus, maybe at this time I would still be poor… ” and another added, “…we don’t have money to buy buffaloes, chickens and pigs to pray for the spirits of the god of land or the god of water when those gods make us get sick.”

Where does this leave us? Whether looking at Cambodian or US health care, the law of demand, with price and quantity inversely related, is a powerful incentive.

We should also note that one source of the ripple of change for these Cambodian villagers was repaving National Road 78. Improved to facilitate logging in the area, the road also has exposed local villagers in Ratanakiri to new ideas, to Western medicine, to better schooling and to more missionaries. This article in the Phnom Penh Post gives the details. And thanks to marginal revolution for the link.

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Venezuela has 2 basic economic problems:

  1. The law of supply: Because price and quantity move in the same direction, if price goes down, then producers provide less. This takes us to Venezuela’s 27.1% inflation rate. President Hugo Chavez responded by controlling the prices of many consumer goods and services. One result? Importers pay the soaring world price for corn, they receive the Venezuelan government’s controlled price for corn oil, and supermarkets have shortages.
  2. The law of demand: Because price and quantity have an inverse relationship, consumers want to buy more when price goes down. Here, Marketwatch tells us that government subsidized gas prices are so low in Venezuela that President Chavez chastised Venezuelans for excessive driving. At $.12 a gallon, it costs $2.40 to fill a 20-gallon tank! Complementary products? Venezuela had unusually high Hummer sales.

So, when, Transparency.org says that Venezuela ranks near the bottom on world corruption scores and the Index of Economic Freedom indicates business activity is limited by multiple government constraints, the results can be explained by supply and demand.

The Economic Lesson

This takes us to the three basic economic questions that every country needs to answer:

  1. What will be produced?
  2. How will goods and services be produced?
  3. Who will receive income?

When government distorts supply and demand decisions by controlling prices, it changes the answers to the 3 economic questions.

An Economic Question: How could price controls change the answers to the 3 economic questions?

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