Price controls, regulation and government failure
| English | Chinese | Pinyin |
|---|---|---|
| shortage | 短缺 | duǎn quē |
| surplus | 过剩 | guò shèng |
| price ceiling | 价格上限 | jià gé shàng xiàn |
| price floor | 价格下限 | jià gé xià xiàn |
| government failure | 政府失灵 | zhèng fǔ shī líng |
| unintended consequences | 意外后果 | yì wài hòu guǒ |
When the government sets the price
- Rent caps to help tenants, minimum wages to help workers — governments sometimes override the market price directly.
- But forcing price away from equilibrium always creates a shortage 短缺 or a surplus 过剩.
A maximum price (price ceiling) set below equilibrium causes a:
Below equilibrium, demand exceeds supply → a persistent shortage.
A price ceiling is a legal ______ price (it binds when set below equilibrium).
A ceiling is a maximum; a floor is a minimum.
Maximum price (price ceiling 价格上限)
- A price ceiling set below equilibrium (e.g. rent control) makes the good cheaper — but demand now exceeds supply.
- The result is a persistent shortage (and often queues or black markets).
A ceiling below equilibrium: quantity demanded exceeds quantity supplied — a shortage.
Price controls
A price set away from equilibrium causes a shortage or a surplus.
A minimum wage (a price floor in the labour market) set above equilibrium can cause:
Above equilibrium, supply exceeds demand → a surplus, i.e. unemployment.
Match each control to its result.
A binding ceiling creates excess demand; a binding floor creates excess supply.
Minimum price (price floor 价格下限)
- A price floor set above equilibrium (e.g. a minimum wage, or farm price support) raises the price — but supply now exceeds demand.
- The result is a surplus (e.g. unemployment in a labour market, or unsold food).
A maximum price causes a shortage; a minimum price causes a surplus
Government failure occurs when intervention creates unintended consequences that worsen welfare.
E.g. rent caps can reduce the supply of housing over time.
Government failure 政府失灵
- Intervention can make things worse — government failure — through:
- unintended consequences 意外后果 (rent caps → fewer flats built), information gaps, and administrative costs.
Ceiling = shortage, floor = surplus. A ceiling is a maximum (binds below equilibrium → shortage); a floor is a minimum (binds above → surplus). Don't swap them.
You've got it
- price ceiling (max, below equilibrium) → shortage; price floor (min, above) → surplus
- both move the market away from equilibrium, creating excess demand or supply
- government failure: intervention with unintended consequences can worsen welfare