ABSTRACT
The shape of the ARL age distribution is anomalous because of its under-representation of young people and over-representation of individuals aged 45 to 49. Possible explanations for these anomalies include the unprecedented increase in the number of librarian positions in the 1960s, the subsequent, equally dramatic, reduction in the rate of hire for ARL libraries, the limited mobility of many ARL librarians and the transfer of experienced librarians into ARL libraries.
