Seasonal adjustment removes the effects of events that follow a more or less regular pattern each year. These adjustments make it easier to observe the cyclical and other non-seasonal movements in a data series.
Include those who worked in their own business, profession, or on their own farm. Since 1967, published data exclude those who operate their own incorporated business or farm. Estimates for such workers are published separately.
An interruption in a time-series caused either by change in definition, or in methodology, etc. This makes it improper to compare data after the change with data from before the change.
- Standard Industrial Classification (SIC) System
The SIC system was used throughout the federal government to group establishments into industries. The SIC Division Structure collected and calculated establishment data by broad industrial divisions (labeled A through K), industrial groups (the 2-and 3-digit SIC levels), and specific industries (the 4-digit level). The SIC System has been replaced by NAICS, the North American Industry Classification System (see above).
- Standard Occupational Classification (SOC) system
This system will be used by all Federal statistical agencies to classify workers into occupational categories for the purpose of collecting, calculating, or disseminating data. All workers are classified into one of over 820 occupations according to their occupational definition. To facilitate classification, occupations are combined to form 23 major groups, 96 minor groups, and 449 broad occupations. Each broad occupation includes detailed occupation(s) requiring similar job duties, skills, education, or experience.
Funds deposited in state accounts in the Unemployment Trust Fund (UTF). These revenues are used to pay state Unemployment Insurance benefits and the state share of EB (Extended Benefits). (USDOL)
The total number of employers subject to Unemployment Insurance taxes. (ETA 581) (USDOL)