Sørensen, K. L. and R. Vejlin, "Return to Experience and Initial Wage Level: Do Low Wage Workers Catch Up?", Journal of Applied Econometrics, Vol. 29, No. 6, 2014, pp. 984-1006. The data used in this paper builds on anonymized micro data sets owned by Statistics Denmark (SD). Analyses of such data sets must be done on servers hosted by Statistics Denmark, and SD does not permit such data to be used elsewhere. The analysis data set will be archived for at least 5 years. In the interest of scientific validation of analyses published using DS micro data, the Department of Economics and Business, Aarhus University, will assist researchers in obtaining access to the data set. The access is conditional on SD accepting a contract with the researcher in which he accepts the conditions of DS for using micro data, see http://www.dst.dk/en/TilSalg/Forskningsservice/Dataadgang.aspx. Requests for getting access can be emailed to: datamanager_econ.au.dk@econ.au.dk. SD maintain a vast amount of full population registers. The ones used in this paper are called IDA (Integrated Database for Labor Market Research) and SPELL (weekly transition data, maintained by SD but compiled by the Department of Economics and Business, Aarhus University). The data contain socio-economic information on the entire Danish population, the population's attachment to the labor market, and at which firms workers are employed on a yearly basis. Both persons and firms can be monitored from 1980 onwards. At time of this publication, the last year of observation is 2011. The data also hold information on individual weekly labor market transitions and public transfers. The gross sample used in this paper contains all male workers having their main employment at a private firm in the period of 1987--2006 and having entered the labor market after 1980. Afterwards we cut the sample as pointed out in the paper. Kenneth Lykke Sørensen KeLy [AT] kora.dk Rune Vejlin rvejlin [AT] econ.au.dk