How is labour productivity calculated?
Labour productivity is real output divided by employment or hours worked.
Mechanism and examples
Output per hour separates changes in working time better than output per worker. Technology, capital, skills, management and industry composition affect the result. An increase does not simply mean workers exerted more effort. Analysis should state the assumption that other conditions remain unchanged, because simultaneous changes in real data can alter the outcome. In practice, it first identifies the decision makers, the price or quantity that changes, and the time horizon over which the response is measured. This explains why the same concept can produce different outcomes for households, firms and whole economies.
What matters when interpreting it?
Cross-country comparisons need compatible price conversion, coverage and hours data. Productivity gains do not automatically pass equally into wages; bargaining, institutions and distribution matter. Data sources, periods, price adjustments and comparison groups can affect the result. To understand why an indicator changed, it is checked against related production, income, employment or price evidence. The concept should therefore be used as an analytical comparison tool with visible assumptions, not as a certain forecast or personal financial recommendation on its own.