Oferta de Trabalho com Curvatura Reversa

The reservation wage is the lowest wage at which a worker accepts a job. Above this threshold, the quantity of labor supplied typically increases with wage increases, reflecting a direct relationship between higher compensation and willingness to work more hours. This establishes the starting point for individual labor supply decisions.

The substitution effect occurs when higher wages increase the opportunity cost of leisure, making it relatively more expensive compared to goods and services. Workers respond by choosing less leisure and working more hours to earn additional income. This effect typically causes the labor supply curve to slope upward at lower wage levels.

As income rises, leisure becomes a normal good that workers desire more of. The income effect causes individuals to value leisure time more highly and choose to purchase it by working fewer hours. When the desire for leisure outweighs the incentive to earn additional income, workers reduce their labor supply despite wage increases.

A backward bending labor supply curve occurs when the income effect dominates the substitution effect at higher wage levels. Beyond a certain threshold, workers prioritize leisure over additional earnings, leading them to work fewer hours as wages continue to rise. This creates the characteristic backward bend in an individual's labor supply curve.

Neil initially works longer hours as wages rise, demonstrating the substitution effect. However, beyond a certain point, he realizes that additional work reduces his valued leisure time, such as watching television. Despite further wage increases, Neil chooses not to increase or even reduces his work hours, exemplifying how the income effect can override wage incentives.

Unlike individual labor supply curves, which can bend backward at high wages, the market labor supply curve typically slopes upward. This occurs because as wages rise across the market, new workers enter the labor force, offsetting any reduction in hours worked by existing workers who prioritize leisure.

Opportunity cost represents the income foregone by choosing not to work. As wages rise, the opportunity cost of leisure increases, making leisure relatively more expensive. This cost-benefit calculation influences whether workers substitute leisure for labor or vice versa, fundamentally shaping their labor supply decisions.