Economics: The Shock That Travels — How One Disruption Moves Every Price
C1 Advanced Economics
Instructions: skim the question stems, then press play and listen once, taking notes. Answer all 5 questions, check your score and error analysis — and only then open the study pack (transcript, vocabulary, paraphrases, model notes).
📦 Show transcript & study pack — only after you have answered
Full transcript
All right, let's pick up where we left off. Last time we treated supply and demand as two independent curves. Today I wanna complicate that, because in a real economy, nothing happens in isolation.
Economists use the term supply shock for a sudden event that changes the cost or availability of a key input. The classic case — the one in every textbook — is oil. Think about what oil touches. Not just gasoline: the diesel in delivery trucks, the natural gas in fertilizer plants, the plastic in, well, everything. So when crude jumps forty percent in a month, the shock doesn't stay in the energy sector. It propagates. Economists call those second-round effects, and honestly, they're usually bigger than the first round.
Here's where it gets interesting. A bakery doesn't buy crude oil. But it buys flour, which was shipped by truck, grown with fertilizer, and baked in an oven powered by gas. So its costs creep up, and the owner faces a choice: absorb the cost and shrink her margins, or pass it on to customers. Most firms, sooner or later, pass it on. That's how a shock in one market becomes general inflation.
Funny thing — the bakery owner near campus apologized to me last week: she'd raised her croissant prices three times this year, and she felt guilty about it. Anyway, that's the human side of what we're modeling.
The policy question is what the central bank should do. Raising interest rates can slow demand and fight inflation — but it risks tipping the economy into recession, because the original problem wasn't excessive demand; it was restricted supply. You're treating a supply disease with a demand medicine. That dilemma is what makes supply shocks the hardest problem in macroeconomic policy. On Thursday we'll see how different central banks handled it — and the answers weren't all the same.
Difficult vocabulary
| propagate | to spread or travel through a system, the way the oil shock spreads into food prices |
| absorb the cost | to pay an extra cost yourself instead of charging customers more |
| margins | the profit a business keeps from each sale, after its costs are paid |
| recession | a period when the economy shrinks and businesses sell less |
| tipping into | crossing a line into a new state — here, sliding from slow growth into recession |
Important phrases
- second-round effects — the indirect consequences that follow the first, direct impact
- pass it on — to transfer a cost to the next person, usually the customer
- in isolation — by itself, separate from everything connected to it
Paraphrases — what you heard vs what it means
| You heard | It means |
|---|---|
| the shock doesn't stay in the energy sector | the effects spread into many other industries |
| you're treating a supply disease with a demand medicine | raising interest rates attacks demand, but the real problem is supply |
| nothing happens in isolation | every part of the economy is connected to other parts |
Note-taking analysis — model notes
Compare with your own notes: did you catch the main claim, the arrows (cause/effect), the contrasts and the compressed examples?