The quantum effect of fertility refers to the total number of children a woman has over her reproductive lifespan, usually captured by the Total Fertility Rate (TFR). It stands in contrast to the tempo effect, which reflects when births occur. A woman delaying childbirth may lower the period TFR (a tempo effect), even if her eventual completed fertility (quantum) remains unchanged. The distinction is critical in demography but also deeply relevant to economics and evolutionary biology.
Read MoreThe theory of efficiency wages is one of the most enduring ideas in labour economics, bridging the gap between microeconomic models of firm behaviour and macroeconomic phenomena such as unemployment and wage rigidity. Its central proposition is deceptively simple: firms may rationally choose to pay wages above the market-clearing level because higher pay can enhance productivity, reduce turnover, attract better workers, or deter shirking. Yet this simple insight has profound implications for how economists think about labour markets, unemployment, and the role of policy.
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