A-Level Economics: Wage Determination in Perfectly Competitive Markets | A-Level 经济：完全竞争市场的工资决定机制

📚 A-Level Economics: Wage Determination in Perfectly Competitive Markets | A-Level 经济：完全竞争市场的工资决定机制

This article explains how wages are determined in a perfectly competitive labour market, a core topic in CIE A-Level Economics. We will examine the demand for and supply of labour, the profit-maximising hiring decision of a firm, and why the equilibrium wage is equal to the marginal revenue product of labour.

本文讲解完全竞争劳动力市场中的工资决定机制，这是 CIE A-Level 经济学的核心考点。我们将分析劳动的需求与供给、企业利润最大化下的雇佣决策，以及均衡工资为何等于劳动的边际收益产品。

The wage rate is not simply a price in a product market; it is the return to labour as a factor of production. Understanding the market forces behind wages helps economists analyse income distribution, poverty, and the effects of government policy. The competitive model is the baseline from which more complex labour-market structures are understood.

工资率并不仅仅是产品市场上的价格，它同时是劳动作为生产要素所获得的报酬。理解工资背后的市场力量，有助于经济学家分析收入分配、贫困以及政府政策的效果。竞争性模型是理解更复杂劳动市场结构的基准。

1. The Market for Labour | 劳动力市场概述

In a perfectly competitive labour market, there are many firms competing to hire workers and many workers offering identical skills. No single buyer or seller can influence the market wage. All workers are assumed to be homogeneous, meaning they have the same productivity, training, and characteristics. Information is perfect, and workers are completely mobile between firms and occupations.

在完全竞争劳动力市场中，有许多企业竞相雇用工人，也有许多工人提供相同技能。任何单一的买方或卖方都无法影响市场工资。所有工人被假定为同质的，即生产力、培训与特征完全相同。信息是完全的，工人可以在企业之间、职业之间完全自由流动。

Wages are determined by the interaction of market demand and market supply for labour. This functions just like price determination in a product market, except that the demand for labour is a derived demand. Because no

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