Tom Konrad CFA
The last ten years have brought
a structural change to the world oil market, with changes in
demand increasingly playing a role in maintaining the
supply/demand balance. These changes will come at an
increasingly onerous cost to our economy unless we take steps to
make our demand for oil more flexible.
We're not running out of oil. There's still plenty of oil
still in the ground. Oil which was previously too expensive
to exploit becomes economic with a rising oil price. To the
uncritical observer, it might seem as if there is nothing to worry
about in the oil market.
Unfortunately, there is something to worry about, at least if we
want a healthy economy. The new oil reserves we're now
exploiting are not only more expensive to develop, but they also
take much longer between the time the first well is drilled and
the when the first oil is produced. That means it takes
longer for oil supply to respond to changes in price.
In economic terms, the oil supply is becoming less elastic as new oil supplies
come increasingly from unconventional oil. Elasticity is the
term economists use to describe how much supply or demand responds
to changes in price. If a small change in price produces a
large change in demand, demand is said to be elastic. If a
large change in price produces a small change in supply, then
supply is said to be inelastic.
Elasticity of Demand
On the demand side, the elasticity of our demand for oil reflects
the options we have to using oil for our daily needs. At a
personal level, we can quickly cut our demand for oil a little bit
by combining car trips, keeping our tires properly inflated,
etc. But the ability to make such reductions is often
limited, and even such simple measures come at a cost of time or
convenience, which is why we're not doing them already. If
we live in an area without good public transport (as most of us
do) we can't stop driving to work without losing our job, so we
keep driving to work, and paying more for the gas to get there.
Over the longer term, our personal options to cut oil consumption
increase. We can move closer to work, or to somewhere where
we can walk or use public transport to get to our job. This is why
the most fuel-efficient vehicle is a moving van.
Replacing a car with a more fuel efficient vehicle is an option
for those who have money or credit, but the people who are under
the most pressure from high fuel prices are unlikely to be able to
afford such options. If they can't resort to ride sharing or
public transport, they may simply lose their jobs because they
can't afford to get there.
The reduction in fuel use that comes from people losing their
jobs and no longer commuting to work also contributes to the
elasticity of demand, and I mention it to highlight the point that
while reductions in fuel use can be benign (properly inflated
tires, for instance), they can also be harmful to the
economy. Reductions in demand due to high prices are often
called demand destruction,
and it's just as unpleasant as it sounds.
Elasticity of Supply
Since our options for reducing oil demand in response to rising
prices range from inconvenient to expensive, to downright painful,
it's clear why the media and politicians focus so much attention
on the other half of the equation: When supply adapts to changes
in demand, voters don't have to make uncomfortable choices.
But there are also limits to the ability of oil supply to
adjust. Most OPEC nations, including Saudi
Arabia, need at least a $100/bbl for oil to keep their
budgets in balance, so why would they increase production to
reduce the price below that? In fact, as (subsidized and
hence inelastic) OPEC domestic consumption continues to increase
faster than supply, OPEC net exports will continue to fall,
further raising the price needed to balance exporters'
budgets.
While fiscal issues constrain OPEC's elasticity of supply,
geology and politics constrain oil supply elsewhere.
Brazil's giant pre-salt fields, like deep water discoveries in the
Gulf of Mexico and elsewhere, are much more expensive and slow to
develop than were past discoveries. Canada's tar sands are
large mining operations, and are similarly slow and expensive to
develop.
Put simply, if the oil were quick and easy to get at, we'd have
gotten it already. All these factors mean that the
elasticity of oil supply is falling, so oil demand has to adjust
more in response to changes in price than in the past.
Data
Since there is little reason to assume that the elasticity of oil
demand has changed significantly (do we have more options for
doing without oil than we did ten or twenty years ago?) while the
elasticity of oil supply has fallen, we have to expect that
overall oil price elasticity has fallen as well, and these changes
should show up in oil market data.
Using oil annual supply, price and consumption data from the EIA and
IEA,
and making some back-of the envelope adjustments to account for
the difference between their different definitions of what
constitutes oil, I made some estimates of the price elasticity of
oil supply and demand.
Since neither demand nor supply can respond instantly to changes
in price, I first had to estimate the average reaction time.
To do this, I looked at the correlation between changes in the oil
price and changes in supply and demand with various lags. I
used price and volume changes over a period of three years because
three year changes gave me the strongest results, although one and
two year changes were similar.
Below you can see the correlations between three year changes US
and worldwide supply and demand with three year changes in US oil
prices (WTI) and world oil prices (Brent), after various lags:

Note that we're looking for negative correlation between price
and demand (we use less oil when we have to pay more for it), and
positive correlation between price and supply (companies produce
more oil if they can get more money for it.)
From the chart, we can see that world oil supply has historically
taken about one year to respond to changes in world prices (the
blue line peaks at 40% correlation with a one year lag), while
domestic US oil production (supply) has typically taken about four
years to respond to changes in the oil price, but that response is
much stronger than the response of world supply.
The difference between the response between US and world oil
supply makes sense because domestic oil production operates in a
much freer market than world oil supply, where changes are mostly
dominated by political decisions in a few OPEC nations.
Political decisions are quicker than drilling new wells (one year
as opposed to four), but they are only about half as responsive to
changes in price.
On the demand side, we see very little response to changes in
price at all. The correlation between demand and price is
always positive, showing that changes in supply have accounted for
virtually all of the market response to oil price changes over the
period.
Changes Over Time
To test my hypothesis that supply is becoming less elastic, I
split my data set into two periods, one from 1987 to 2000, and one
from 2001 to 2010. If the hypothesis is correct, we will see
less supply and more demand price response in the later period
than in the earlier one.
The graphs which follow show significant changes in how both
supply and demand respond to changes in price. Perhaps the
most significant change is that we now see a response in the
demand for oil to the oil price.
In the early period, only US demand for oil shows a small
response to price, with a slight negative correlation (-30%)
between three year changes in US demand and changes in
price. World oil demand still shows no measurable price
response. I take this to indicate that at the end of the
last century, Americans responded to changes in the oil price by
using the relatively easy options such as eliminating
discretionary trips when oil prices rose, but price was not an
important factor for determining world oil consumption.

In the later period, the US demand no longer shows a short-term
response to rises in the oil price, perhaps because the easy
reductions in oil use have already been made, but we now see a
relatively strong response to higher oil prices (with a -90%
correlation) over a period of four years for both US and world oil
demand. This probably corresponds to such changes as
purchasing more efficient vehicles, and minimizing commutes by
moving closer to work or working more from home.

Confirmation
World oil demand's very significant response to changes in the
oil price implies that demand is now playing a much bigger role in
the adjustments the oil market makes to changes in price than it
has in the past.
Because oil supply has become less elastic and less responsive to
changes in price, oil prices have become much more volatile in
order to force market adjustments.
The chart below shows that while the magnitude (either up or down) of annual changes in supply and consumption have been in the 3% to 7% range for the last quarter of a century, the magnitude of oil price changes has been rising relentlessly. In the 1990s, oil prices usually changed by an average of 25% or less per year, while they now typically change by three or four times that amount in any given year.

If the price elasticity of the oil market had not been falling
over time, the increasing magnitude of changes in oil prices would
have produced a similar increase in the magnitude changes in oil
supply and demand.
As the Market For Oil Becomes Less Flexible, We Should Make the
Market for Transportation Services More Flexible to Compensate
If what we care about are the effects on the economy, it does not
matter how much oil is in the ground. Over the last ten
years, we have see a structural change in the oil market which
will continue to have far-reaching effects on the economy even if
we manage to increase the amount of oil produced.
Before 2000, oil supply did the heavy lifting when it came to
balancing supply and demand in the oil market. That is no
longer the case, and the oil price signal has grown significantly
stronger in order to elicit a response in demand.
With 2% of the world's oil reserves, changes in the US supply of
oil will remain insignificant in the world oil supply demand
picture, developments in the Bakken shale and cheer
leading from political leaders notwithstanding. On the
other hand, as the consumer of a quarter of the world's oil
supply, we can have a significant effect on the world oil market
by making sure that our economy can adjust quickly and easily to
changes in the oil price.
What measures can we take to increase the elasticity of oil
demand, and reduce the pain of demand destruction? Measures
which increase our citizen's options for reducing oil use.
- Increased investment in alternative modes of transport, such as mass transit (both buses and rail), bike lanes, bike and car sharing, and walking improvements to allow many more workers the option of getting to their jobs without the use of a personal car.
- Improvements in our nation's rail system to allow more freight to be shifted from truck to rail.
- Increasing gas taxes slowly and predictably over time to both fund the above improvements, and to signal to consumers that they need to prepare for long term higher prices by purchasing more efficient vehicles and changing where they live so that they have the ability to reduce their driving.
- The use of road congestion pricing, pay as you drive insurance, and other price signals that give people the right market signals and enhance the most efficient use of our nation's roadways.
- Encouraging the electrification of transport (including the
alternative transport options mentioned above) to provide
transport options which are not dependent on oil.
In short, we need to make the market for transportation services
more efficient by encouraging new entrants (mass transit, bikes,
trains) and competition with the incumbent car/internal combustion
engine infrastructure. Competition within the car
infrastructure should also be encouraged by sending price signals
such as the slowly and predictably increasing gas tax mentioned
above to better reflect the dangers to our economy posed by the
new oil market regime.
Thanks to Jim Hansen of Ravenna
Capital Management for his help. This article was first
published on Forbes.com.




































The most recent issue of Fortune has an excellent interview with Jim Rogers,
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