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Economic News Release
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Work Stoppages Technical Note

                                            TECHNICAL NOTE

The Bureau of Labor Statistics provides information on major (1,000 workers or more) work stoppages in 
the United States. The number of workers includes those idled for one shift or longer in the 
establishment(s) directly involved in the dispute as well as those in the establishment idled for 
related reasons, such as their facility is closed down during the stoppage. An attempt is made to 
contact the parties involved in the work stoppage (employer, employer group, and union) to determine 
whether the duration and number of workers idled by the stoppage meet the thresholds for inclusion in 
this report. For additional information on the concepts, data sources, design, measures, and history of 
the work stoppages program, see www.bls.gov/opub/hom/wsp/home.htm.

Detailed monthly work stoppage data since 1993 are available at 
www.bls.gov/web/wkstp/monthly-listing.htm and includes organizations involved, location, beginning and 
ending dates, industry, ownership, the number of workers, and total days of idleness.

Annual historical major work stoppages data from 1947 to present, including the number of work 
stoppages, workers idled, and total days of idleness, are available at 
www.bls.gov/web/wkstp/annual-listing.htm. 

Historical Bureau of Labor Statistics work stoppages publications are available from 1936 to 1979 
at www.bls.gov/wsp/questions-and-answers.htm#Question_10. 

The latest Union Members report is available at www.bls.gov/news.release/pdf/union2.pdf. 

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Last Modified Date: March 01, 2021