How to measure the audience of municipal libraries: institutional statistics and public surveys

The « Crédoc » survey has provoked surprise by going counter to the DLL (Department of Books and Reading) statistics and the pessimism that they crea-ted. At present, the differences between the Crédoc and DLL surveys can be explained and make sense if the indicators and methodologies are placed side to side: population surveys (face to face), spaced at intervals and excluding under fifteen years old on the one hand, and on the other an annual record of the data from a sample of libraries presented to the whole of the public. As well as this, a phenomenon has come to light from the Crédoc survey: that of new types of use in municipal libraries.