While powerful, seasonal adjustment is not perfect.
Employment naturally fluctuates throughout the year due to factors that happen at the same time every year: seasonally adjusted unemployment rate meaning
Unseasonably warm winters can alter traditional construction hiring timelines. While powerful, seasonal adjustment is not perfect
Raw economic data is called . Modified data is called Seasonally Adjusted (SA) . Not Seasonally Adjusted (NSA) Seasonally Adjusted (SA) Data Source Raw headcounts and surveys. Statistical modeling applied to NSA data. Distortions High spikes due to holidays/weather. Smooth trends with seasonal noise removed. Best Used For Real-time local budgeting and staffing. Month-over-month macroeconomic analysis. Comparison Same month across different years. Consecutive months within the same year. 💡 How the Calculation Works Modified data is called Seasonally Adjusted (SA)
Notice that in both January and June, the adjusted rate is the same: . This tells the economist that, after accounting for seasonal quirks, the labor market hasn’t changed at all. The economy is stable.