In the 2009/2010 survey waves of the National Educational Panel Study (NEPS), roughly 70% of adult respondents replied to the question about their income with an approximate value—a common phenomenon also in other surveys. This distortion of the actual income distribution has a negative influence on the accuracy of the statistical analysis and relating conclusions. Dr. Sabine Zinn and Dr. Ariane Würbach of the Leibniz Institute for Educational Trajectories have developed a statistical model that allows researchers to make reliable statements about the actual income distribution even in the case of values rounded not at random.