The negative binomial distribution as a trend distribution for circulation data in Flemish public libraries

Abstract

Based on data collected by the authors in Flemish public libraries, we show how the negative binomial distribution (NBD) can be used as a trend distribution for library circulation data. Although actual data show more variation than simple statistics can explain, we recommend the use of the NBD for practical, managerial purposes. As a consequence we also recommend the teaching of these methods in introductory library management courses.