Sylvia Fruehwirth-Schnatter, Christoph Pamminger, Andrea Weber, and Rudolf Winter-Ebmer, "Labor Market Entry and Earnings Dynamics: Bayesian Inference Using Mixtures-of-Experts Markov Chain Clustering", Journal of Applied Econometrics, Vol. 27, No. 7, 2012, pp. 1116-1137. Our empirical analysis is based on data from the Austrian Social Security Database (ASSD), which combines detailed longitudinal information on employment and earnings of all private sector workers in Austria since 1972. The following IEW Working Paper gives an overview and a description of the main characteristics of the Austrian Social Security Database: Zweimüller, Josef, Winter-Ebmer, Rudolf, Lalive, Rafael, Kuhn, Andreas, Wuellrich, Jean-Philippe, Ruf, Oliver and Büchi, Simon, Austrian Social Security Database (May 4, 2009). Available at SSRN: http://ssrn.com/abstract=1399350 or at http://www.labornrn.at/wp/wp0903.pdf. The ASSD was made available for the Austrian Center of Labor Economics and the Analysis of the Welfare State (www.labornrn.at). The sample we consider consists of N=49279 male Austrian workers, who enter the labor market for the first time in the years 1975 to 1985 and are less than 25 years old at entry. Our cohort analysis is based on an observation period from 1975 to 2005. As our analysis was carried out with R (see www.r-project.org), the data used in our paper are provided as RData-Files but also ASCII files in DOS format. The 5 .RData files are zipped in the file R-data-files.zip. These are binary files. The 5 corresponding .txt files are zipped in the file text-data-files.zip. These are ASCII files in DOS format. Unix/Linux users should use "unzip -a". "LMEntryDataMatrix.RData" contains the data.frame with the covariates used in the logit regression model in RData-Format ("LMEntryDataMatrix.txt" is an ASCII file in DOS format). These files contains the following variables: unEmplRDist: unemployment rate in the district, unskilled: dummy for unskilled workers skilled: dummy for skilled workers whiteColl: dummy for white collar workers wageCat1Dummy,...,wageCat5Dummy: dummy for starting in the corresponding wage category entryYear76,...,entryYear85: dummy for starting in the corresponding year ia.ueRD.wc1D,...,ia.ueRD.wc5D: interaction variable for unemployment rate in the district and the dummies for starting in the corresponding wage category "Njki.RData" contains the transition frequencies in a 3-dim array of dimension 6x6x49279. "NjkiMat.RData" contains these data in matrix format of dimension 49279x36 (each row corresponds to the columns of the matrices in Njki). "NjkiMat.txt" is an ASCII file in DOS format. "mccXiPrior.RData" contains the prior-parameters (used in the paper) for the transition matrices in RData-format. "mccXiPrior.txt" is an ASCII file in DOS format. "Initial_values_for_betas_H4.RData" contains a matrix with the initial values (used in our paper) for the logit regression coefficients in RData-format. "InitValBetas.txt" is an ASCII file in DOS format. "Initial_values_for_classification_H4.RData" contains a vector with some initial values (used in our paper) for the classification variable (group membership for 4 groups) in RData-format. "InitValClass.txt" is an ASCII file in DOS format. The following two files are ASCII files in DOS format. They are zipped in the file programs.zip. "mcClustExtNew.R" contains the R-code for the extended Markov chain clustering (Mixtures-of-Experts Markov Chain Models) procedure presented in the paper. "R_code_for_function_call.txt" contains the corresponding call to the R-programme mcClustExtNew() executable in R (see www.r-project.org) for reproducing the results presented in the paper. Christoph Pamminger christoph.pamminger [AT] jku.at