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%T A likelihood ratio test for stationarity of rating transitions
%A Weißbach, Rafael
%A Walter, Ronja
%J Journal of Econometrics
%N 2
%P 188-194
%V 155
%D 2009
%K Stationarity; Multiple markov process; Counting process; Likelihood ratio; Multiple spells
%= 2011-11-10T16:11:00Z
%~ http://www.peerproject.eu/
%> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-268513
%X "We study the time-stationarity of rating transitions, modelled by a time-continuous discrete-state Markov process and derive a likelihood ratio test. For multiple Markov processes from a multiplicative intensity model, maximum likelihood parameter estimates can be written as martingale transform of the processes, counting transitions between the rating states, so that the profile partial likelihood ratio is asymptotically χ2-distributed. An application to an internal rating data set reveals highly significant instationarity." [author's abstract]
%C GBR
%G en
%9 journal article
%W GESIS - http://www.gesis.org
%~ SSOAR - http://www.ssoar.info