Abstract
A random sample of 588 entries from the 1972 Monthly Catalog was examined to determine time lag between publication date and appearance in the index. The mean time lag was 4.7 months with a range of 1 to 27 months. Publications issued by independent agencies had a time lag of 4.0 months while those from the legislative and executive were 4.2 and 5.2 months. Publications received on deposit had a time lag of 4.1 months while non-depository items had a time lag of 5.8 months. For office use only publications had a time lag of 8.0 months. It was hypothesized that time lag was a function of issuing agency, depository status, whether the item was intended for official use only and whether the item was sold by the Superintendent of Documents. Significant but low relationships were found between time lag and issuing agency, for sale by SuDocs, and depository status. A significant and moderate relationship was found between time lag and official use status.
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