http://repub.eur.nl/res/aut/384/ List of Publications en http://repub.eur.nl/static-eur/img/logo.png http://repub.eur.nl http://repub.eur.nl/res/pub/266/ 2003-01-10T00:00:00Z Correctness, transparency and effectiveness are the principal attributes of knowledge derived from databases. In current data mining research there is a focus on efficiency improvement of algorithms for knowledge discovery. However important limitations of data mining can only be dissolved by the integration of knowledge of experts in the field, encoded in some accessible way, with knowledge derived form patterns in the database. In this paper we will in particular discuss methods for combining expert knowledge and knowledge derived from transaction databases.The framework proposed is applicable to wide variety of risk management problems. We will illustrate the method in a case study on fraud discovery in an insurance company. http://repub.eur.nl/res/pub/301/ 2002-02-15T00:00:00Z Rede, in verkorte vorm uitgesproken bij de aanvaardig van het ambt van hoogleraar aan de Faculteit der Bedrijfskunde met als leeropdracht Bedrijfskunde, in het bijzonder Informatie Management