How can a single buyer's market power affect wages?
A monopsony is a market with one or a dominant buyer; in labour markets it also describes employer power over workers' options.
Mechanism and examples
Moving costs, limited job-search information, licensing or few local employers can give firms wage-setting power. When labour supply to the firm slopes upward, attracting another worker requires a higher wage. 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?
Many listed employers do not guarantee strong competition; occupation and working conditions can narrow options. Measurement should combine worker mobility, vacancies and wages. 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.