gas prices

On Vacation, Does the Law of Demand Apply?

Jeremy Horpedahl1 Comment

I’m on vacation this week. But no, I’m not just saying this to get out of posting this week, or to brag. Americans really have started going back to the normal routine of vacations after a long break during the pandemic.

You might think that the high price of gasoline will slow down summer travel. Not so, according to estimates from AAA. While the total number of estimated travelers for Independence Day weekend is still slightly below Summer 2019 (by about 1 million travelers), travel by car is predicted to be just above 2019 levels (by about 0.5 million travelers), with 42 million Americans traveling by car. Air travel has been a mess lately and quite expensive (even compared to pre-pandemic levels), and is predicated to be about 0.5 million below 2019. Bus/train/cruise travel is still the big loser, well above the past two summers, but still 1 million travelers below 2019. (These are all estimates, of course, but AAA is in the business of knowing this data well.)

What gives? Basic economic theory would tell us that if the price of something increases, people should buy less of it. And traveling by car is much more expensive than in Summer 2019. We should also think about substitutes, and airline travel is certainly a substitute for car travel. But if we look at what has happened to both airfares and gasoline prices since July 2019, we can see that gasoline prices have increased much more (about 60% vs. 25% for airfares).

So, do we just throw up our hands and say: “it’s just too complicated, lots of factors at play”?

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Russia, The US, and Crude Data

Zachary Bartsch4 Comments

Overall, I’ve been disappointed with the reporting on the US embargo against Russian oil. The AP reported that the US imports 8% of Russia’s crude oil exports. But then they and other outlets list a litany of other figures without any context for relative magnitudes. Let’s shine some more light on the crude oil data.*

First, the 8% figure is correct – or, at least it was correct as of December of 2021. The below figure charts the last 7 years of total Russian crude oil exports, US imports of Russian crude oil, and the proportion that US imports compose.  That 8% figure is by no means representative of recent history. The average US proportion in 2015-2018 was 7.8%. But the US share as since risen in level and volatility. Since 2019, the US imports compose an average of 11.9% of all Russian crude oil exports.

As an exogenous shock, the import ban on Russian crude oil might have a substantial impact on Russian exports. However, many of the world’s oil importers were already refusing Russian crude. The US ban may not have a large independent effect on Russian sales and may be a case of congress endorsing a policy that’s already in place voluntarily.

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Gas Prices are High — But Don’t Adjust Them for Inflation!

Jeremy Horpedahl2 Comments

Gasoline prices are high and rising. Anecdotally, they seem to be increasing at the pump by the hour. And indeed, in nominal terms they are now the highest they have ever been in the US (this is true with both the AAA daily price level and the EIA weekly price level). At over $4.10 per gallon, the price now exceeds the peaks briefly hit in 2008, 2011, and 2012. And it’s looking like this peak might not be so brief.

But we all know you can’t compare nominal dollars over long periods of time. We need some context for this price! Plenty of news stories provide what they think is the right context: adjust it for inflation! For example, USA Today reports that today’s price “would come to around $5.25 today when adjusted for inflation.”

$5.25: that’s a pretty concrete number. But it’s not really useful. OK, so clearly that’s higher than the current price, about 20% higher in fact. Still, it doesn’t really give us the right context.

As I argued in a previous post on housing costs, inflation adjustments aren’t always the best way to contextualize a historical number. Yes, when you want to compare income or wages over time, it’s good to adjust for inflation. It’s necessary, in fact. And a good economist will always do that.

However, when comparing particular prices over time, it doesn’t really make sense to adjust for other prices. All you are really saying is “if the price of gasoline increased at the same rate as the average price level, here’s what it would be.” Perhaps slightly useful, but it doesn’t really get at the thing we’re really try to address: is gasoline more or less affordable than in the past?

The best approach is to adjust the prices for changes in wages or income. Which measure of wages or income you choose is important, but it’s the best adjustment to make. No need to make any inflation adjustments, are worrying about whether the index you choose is properly accounting for quality changes, substitution effects, etc. If you want to know how affordable something is, compare it to income.

Here’s what I think is the best simple comparison for gasoline, which I’ll explain it below. In short, it tells us how many minutes the average worker would need to work to purchase one gallon of gasoline.

Since the price of gasoline is rising sharply every day lately, my chart will surely be out of date very soon. But right now, it’s the most current data I could provide with a comparable historical series: EIA weekly data current through March 7th, 2022 (Monday). We can see that at current prices, it takes about 9 minutes of work at the average wage to purchase a gallon of gasoline. At the peak in 2008, it took over 13 minutes of work to purchase a gallon, and it fluctuated between 10 and 12 minutes of work for much of 2011-2014.

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