首先，理解了Essay的結(jié)構(gòu)(p2)，今后在答題時就會游刃有余。

舉例說明：

With the help of diagram,discuss whether consumers will benefit from the introduction on a product of an effective maximum price.

Relevant definitions(Key terms)+Formula

首先我們識別出題干中的 key terms-maximum price 并對其定義進行描述，描述完定義后對其condition進行描述。

【Define maximum price】

Maximum price is the maximum legal price that a seller is allowed to charge for a product.The price is not allowed to rise above this level but it is permitted to fall below it.

【The condition for maximum price to be effective】

If the maximum price is set above the equilibrium prices,it has no effect,

since the equilibrium remains attainable. It is effective when set below the equilibrium price.

The net gain to consumers is the difference between rectangle A and triangle B.

Another major consequence of maximum price,with or without rationing,is the emergence of the black markets. This is a market in which goods are sold illegally at whatever price equates illegal demand and supply.

Black marketers would buy Q1 at the controlled price of p1 paying the amount measured by rectangle E.

They would sell at the price pb,earning profits shown by the gray area between pb and p1. The existence of such a market results in all consumers becoming definitely worse off.

evaluation (Conclusion)

最后說明consumers 是否benefit存在一些局限性：最高價格的總體影響取決于固定價格是低于還是高于市場均衡價格。

【Conclusion】

Finally we conclude that overall effect of maximum price depends on whether the price is fixed is below or above the market equilibrium price,

so far the consumer benefit is concerned maximum price can potentially result in an increase in consumer surplus .