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In labour economics, Shapiro–Stiglitz theory of efficiency wages (or Shapiro–Stiglitz efficiency wage model) [1] is an economic theory of wages and unemployment in labour market equilibrium. It provides a technical description of why wages are unlikely to fall and how involuntary unemployment appears.
In the model, an equilibrium is reached when the expected wage in urban areas (actual wage adjusted for the unemployment rate), is equal to the marginal product of an agricultural worker. The model assumes that unemployment is non-existent in the rural agricultural sector.
Because workers are paid more than the equilibrium wage, there may be unemployment, as the above-market wage rates attract more workers. [citation needed] Efficiency wages offer, therefore, a market failure explanation of unemployment in contrast to theories that emphasize government intervention such as minimum wages. [2]
The equilibrium price for a certain type of labor is the wage rate. [5] However, economist Steve Fleetwood revisited the empirical reality of supply and demand curves in labor markets and concluded that the evidence is "at best inconclusive and at worst casts doubt on their existence."
In most simple microeconomic stories of supply and demand a static equilibrium is observed in a market; however, economic equilibrium can be also dynamic. Equilibrium may also be economy-wide or general, as opposed to the partial equilibrium of a single market. Equilibrium can change if there is a change in demand or supply conditions.
These supply and demand curves can be analysed in the same way as any other industry demand and supply curves to determine equilibrium wage and employment levels. 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 ...
In the short run (and possibly in the long run), markets may find a temporary equilibrium at a price and quantity that does not correspond with the long-term market-clearing balance. For example, in the theory of " efficiency wages ", a labor market can be in equilibrium above the market-clearing wage since each employer has the incentive to ...
The mean and variance of the function vary based on the data, whether the data is firm-level or employee-level data. The equilibrium of the hedonic wage function between employee wages and non-wage-related attributes for a particular job argues there is a minimal correlation to workers' preferences. [16]