The Chain Reaction of Inflation | 通货膨胀的连锁反应

📚 The Chain Reaction of Inflation | 通货膨胀的连锁反应

Inflation is never an isolated event. A shock to prices sets off a series of responses by workers, firms, banks and governments, and each response can feed back into the original shock. Understanding these interlocking mechanisms is essential for exam answers about macroeconomic stability.

通货膨胀从来不是孤立事件。一次价格冲击会引发工人、企业、银行和政府的系列反应，而每一种反应又会反过来强化最初的冲击。理解这些环环相扣的机制，是回答宏观经济稳定类考题的关键。

1. What Is Inflation? | 什么是通货膨胀？

Inflation is a sustained rise in the general price level measured over a period of time. It is usually measured by the Consumer Price Index (CPI), which tracks the cost of a typical basket of goods and services. In the UK, the Bank of England targets a 2% CPI inflation rate.

通货膨胀是指一般价格水平在一段时期内持续上涨。通常用消费者价格指数（CPI）衡量，该指数跟踪一篮子典型商品和服务的成本。在英国，英格兰银行将CPI通胀率目标设定为2%。

Inflation matters because it changes the real value of money, wages, savings and debts. A 5% inflation rate means that a fixed £100 note buys 5% less next year, unless the holder’s income also rises by 5%.

通胀之所以重要，是因为它会改变货币、工资、储蓄和债务的实际价值。5%的通胀率意味着固定面额的100英镑在一年后少买5%的商品，除非持有者的收入也同步增长5%。

2. The First Spark: Demand-Pull and Cost-Push | 导火索：需求拉动与成本推动

Inflation can start from the demand side. When aggregate demand grows faster than the economy’s productive capacity, excess spending pulls prices upwards. This is demand-pull inflation, often caused by loose monetary policy, fiscal expansion or a boom in exports.

通胀可以从需求侧启动。当总需求增长快于经济体的生产能力时，超额支出会把价格向上拉。这就是需求拉动型通胀，通常由宽松货币政策、财政扩张或出口繁荣引起。

Inflation can also start from the supply side. A rise in wages, raw material prices or energy costs shifts the short-run aggregate supply curve to the left, raising prices as output falls. This is cost-push inflation. An oil price shock is a classic trigger, such as the energy price surge seen in 2021-2022.

通胀也可以从供给侧启动。工资、原材料价格或能源成本上升会使短期总供给曲线左移，在产出下降的同时推高价格。这就是成本推动型通胀。石油价格冲击是典型触发因素，例如2021-2022年出现的能源价格飙升。

Whatever the original cause, the chain reaction begins when firms and households adjust their behaviour to the new price level.

Published by TutorHao | Economics Revision Series | aleveler.com

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