身边的经济学·社会常识英语30篇（1）

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供给与需求如何决定价格

When many people want a product but few units are available, prices usually rise quickly.
Conversely, if factories produce too much while buyers lose interest, sellers must lower prices.
This balance between willingness to buy and ability to supply shapes every market daily.
Even small shifts in consumer habits or production delays can trigger noticeable price changes.
Governments sometimes intervene when extreme shortages or surpluses threaten public welfare or stability.
Farmers, tech firms, and clothing brands all adjust output based on these same economic signals.
Online platforms display real-time demand data, helping businesses forecast inventory needs more accurately.
Understanding this interaction helps explain why concert tickets cost more than bus fares.
It also shows why housing costs jump in cities where jobs grow faster than new apartments.
No central planner sets most prices — they emerge from millions of individual choices.