noref: date=February 2008

Labour economics seeks to understand the functioning and dynamics of the market for labour. Labour markets function through the interaction of workers and employers. Labour economics looks at the suppliers of labour services (workers), the demanders of labour services (employers), and attempts to understand the resulting pattern of wages, employment, and income.

It is an important subject because unemployment is a problem that affects the public most directly and severely. Full employment (or reduced unemployment) is a goal of many modern governments. Other often studied markets are financial market and product market.

In economics, labour (or labor) is a measure of the work done by human beings. It is conventionally contrasted with such other factors of production as land and capital. There are theories which have created a concept called human capital (referring to the skills that workers possess, not necessarily their actual work), although there are also counter posing macro-economic system theories that think human capital is a contradiction in terms.

Compensation and measurement

Other frequently used terms include:

• wage = payment per unit of time (typically an hour)
• earnings = payment accrued over a period (typically a week, a month, or a year)
• total compensation = earnings + other benefits for labour
• income = total compensation + unearned income
• economic rent = total compensation - opportunity cost

Economists measure labour in terms of hours worked, total wages, or efficiency.

• total cost = fixed cost + variable cost

Demand for labour and wage determination

Labour demand is a derived demand, in other words the employer's cost of production is the wage, in which the business or firm benefits from an increased output or revenue. The determinants of employing the addition to labour depends on the Marginal Revenue Product (MRP) of the worker. The MRP is calculated by multiplying the price of the end product or service by the Marginal Physical Product of the worker. If the MRP is greater than a firm's Marginal Cost, then the firm will employ the worker. The firm only employs however up to the point where MRP=MC, not lower, in economic theory.

Wage differences exist, particularly in mixed and fully/partly flexible labour markets. For example, the wages of a doctor and a port cleaner, both employed by the NHS, differ greatly. But why? There are many factors concerning this issue. This includes the MRP (see above) of the worker. A doctor's MRP is far greater than that of the port cleaner. In addition, the barriers to becoming a doctor are far greater than that of becoming a port cleaner. For example to become a doctor takes a lot of education and training which is costly, and only those who are socially and intellectually advantaged can succeed in such a demanding profession. The port cleaner however requires minimal training. The supply of doctors therefore would be much more inelastic than the supply of port cleaners. The demand would also be inelastic as there is a high demand for doctors, so the NHS will pay higher wage rates to attract the profession.