The Oil Shocks: The Decade That Built Modern Energy Policy
Before 1973, energy was cheap, abundant and politically uninteresting in the importing world. Oil had been around two dollars a barrel for two decades and no industrialised country had a ministry devoted to it. Within a decade all of that reversed, and the arrangements built in response are still the ones in use.
What Actually Happened in 1973
By 1973 the industrialised world had rebuilt itself around cheap oil. It fuelled transport, heated buildings, generated a significant share of electricity, and fed the petrochemical industry. Consumption had grown at roughly seven percent a year for two decades, and North American production had passed its peak, so the marginal barrel increasingly came from the Middle East.
In October 1973, following the outbreak of war, Arab members of OPEC announced production cuts and an embargo against several countries supporting Israel. The volumes withheld were a modest share of world supply. The price effect was not modest: within months the posted price went from around three dollars a barrel to around twelve.
The disproportion is the important part. Oil demand is highly inelastic in the short run - a driver who must commute, a utility with oil-fired boilers and a factory with oil-fired furnaces cannot respond within weeks. When demand cannot move, a small supply change produces a large price change. This is the same mechanism that produces price spikes in electricity markets, and it is a property of the demand curve rather than of any particular commodity.
The visible consequences were rationing, filling-station queues, lowered speed limits, and in Britain a three-day working week driven by a coincident coal dispute. Inflation and recession followed across the importing world, and the word stagflation entered general use because the combination of rising prices and falling output did not fit the models then in use.
Why 1979 Was Worse
The second shock followed the Iranian revolution, which cut Iranian exports sharply. In volume terms the disruption was smaller than 1973. Prices nonetheless rose from around fourteen dollars to around thirty-five.
The reason was behavioural. Buyers who had been through 1973 responded by building inventory, and every buyer trying to hold more stock at once creates additional demand on top of the shortfall. Precautionary buying can move a market further than the physical disruption that triggered it, which is why the perception of scarcity is itself a market fundamental.
The aftermath ran the other way and taught the opposite lesson. By the early 1980s the adjustments made after 1973 were finally arriving: more efficient cars, insulated buildings, oil removed from power generation, and new non-OPEC production from the North Sea, Alaska and Mexico. Demand fell, supply rose, and in 1986 the price collapsed to around ten dollars.
That collapse did more lasting damage to alternative energy than the shocks did good. Solar, synthetic fuels and efficiency programmes launched in the 1970s were cancelled en masse when oil became cheap again, and several were not resumed for twenty years. The episode is the standard illustration of why policy built on a high price disappears when the price falls, and why durable programmes are built on standards and mandates instead.
The Institutions That Remain
The International Energy Agency was founded in 1974 by importing countries, with a central obligation that members hold emergency oil stocks equivalent to 90 days of net imports and release them in a coordinated way during a disruption. That obligation is still in force and was invoked in 2022.
Strategic petroleum reserves followed, most visibly the American one in Gulf Coast salt caverns. The idea that a state should hold a physical buffer against supply interruption originates here and has since extended to gas storage and, in some countries, to critical materials.
Fuel economy standards for vehicles began in the United States in 1975 and spread. They are the most consequential efficiency measure of the period by a wide margin, because they attacked the largest single use of oil and because a standard keeps working when the price falls.
France's nuclear programme is the largest single national response. The Messmer plan of 1974 committed the country to building reactors at scale specifically to remove oil and imported fuel from electricity, and France went from majority fossil generation to majority nuclear within about fifteen years - still the fastest decarbonisation of a large grid on record, undertaken for energy security rather than climate reasons.
What the Decade Established
Three findings from the 1970s have held up, and they remain the useful part of the episode.
Demand responds to price, but slowly. Between 1973 and 1985, oil use per unit of economic output in the industrialised world fell by roughly a third. Almost none of that came from people driving less; it came from replacing vehicles, boilers, furnaces and industrial equipment as they wore out. The adjustment is real and it runs at the speed of the capital stock, which is why the short-run pain is severe even where the long-run response is large.
Concentration is the risk, not scarcity. Neither shock involved the world running out of oil. Both involved a large share of traded supply passing through a small number of producers and a few maritime chokepoints. The same structural question applies to any input with concentrated supply, which is why critical minerals now attract the analysis that oil did then.
And policy built on a price is temporary. The programmes that survived 1986 were the ones embedded in standards, institutions and physical stock. The ones that depended on oil staying expensive were cancelled within a few years of it becoming cheap. That is the most transferable lesson the decade offers, and it applies with equal force to anything justified today on the basis of a current price.
Frequently asked questions
What caused the 1973 oil shock?
Arab members of OPEC announced production cuts and an embargo against several countries after the October war. The volumes withheld were a modest share of world supply, but because short-run oil demand is highly inelastic, a small supply change produced a price rise from around three dollars a barrel to around twelve.
Why did the 1979 shock raise prices more despite a smaller disruption?
Because buyers who had experienced 1973 responded by building inventory, and every buyer trying to hold more stock at once adds demand on top of the shortfall. Precautionary purchasing can move a market further than the physical disruption that triggered it.
What institutions came out of the oil shocks?
The International Energy Agency, founded in 1974 with a 90-day emergency stock obligation that still binds members; national strategic petroleum reserves; vehicle fuel economy standards from 1975; and France's Messmer plan, which converted its electricity system to nuclear in about fifteen years for energy-security reasons.
What happened to alternative energy after the shocks?
The 1986 price collapse cancelled most of it. Solar, synthetic fuel and efficiency programmes launched in the 1970s were abandoned when oil became cheap again, and several were not resumed for twenty years. Programmes embedded in standards and institutions survived; those that depended on a high price did not.
Did demand actually fall in response to high prices?
Yes, substantially but slowly. Oil use per unit of economic output in the industrialised world fell by roughly a third between 1973 and 1985, almost entirely through replacing vehicles, boilers and industrial equipment as they wore out rather than through changed behaviour. The adjustment runs at the speed of the capital stock.
