TY - BOOK AU - Labi, Lavri PY - 2016 DA - 2016// TI - Modeling default probability in credit portfolios: evidence based on debt securities issuers in Germany PB - Universität Rostock CY - Rostock AB - Implementation of reliable rating systems for small credit portfolio is hindered by non-observed default events in databases and short time series of data available. In this study we propose an approach to handle those two challenges while developing rating systems. We further extend the approach by estimating systematic risk, that is, co-movements of creditworthiness of debt securities' issuers over time. Based on financial information from the PSVaG's debt securities portfolio, we could show that including a systematic risk component significantly increase the model accuracy. UR - http://rosdok.uni-rostock.de/resolve/urn/urn:nbn:de:gbv:28-diss2017-0122-9 LA - English N1 - author: Lavri Labi ID - 898495938 ER -