Discusses the value of statistics in public library administration and recent efforts by the federal government and the Public Library Association (PLA) to gather public library statistics. PLA's Public Library Data Service (PLDS) Statistical Report '88 and planned online availability are described. An inset shows data on salaries for beginning…

Discusses areas needing revision in the manual "Output Measures for Public Libraries," i.e., measurement objectives, research skills of output measures users, management versus research contexts, relating inputs to outputs, problems in data collection, user versus library performance, sample sizes, interpretation of output measure…

Discusses current issues in measuring library effectiveness, including rapid technological changes and increasing obsolescence in librarians' competencies; increased pressure for accountability; tools to help libraries become what they determine they should be rather than conforming to national standards; and how to determine the validity and…