Voß, Sebastian; Weißbach, Rafael - In: Journal of Econometrics 180 (2014) 1, pp. 16-29
We model credit rating histories as continuous-time discrete-state Markov processes. Infrequent monitoring of the debtors’ solvency will result in erroneous observations of the rating transition times, and consequently in biased parameter estimates. We develop a score test against such...