Non-response and representativity in a survey on education completed abroad

The population of this mandatory Survey on education is immigrants with unknown education; the missing group in the Norwegian education register. In the 2011 survey on education completed abroad, more than 200 000 immigrants had to be contacted in order to fill the gap in the register. We know from other surveys by Statistics Norway that immigrants in general have a higher non-response rate than the rest of the population, especially those with unknown education. We expect the non-response rate to vary within this group. We want to compute the R-indicator and see whether the representativity is increasing or decreasing with regard to auxiliary variables such as country background, age, gender and years living in Norway, after the reminders. Lastly, we will discuss the effects of the reminders on the estimation of the level of education in order to conclude whether the results from the survey can be used for statistical purposes without further adjustments.