Most of the studies in empirical social choice are snapshot-like. These studies do not allow to check whether the results found are intertemporally stable or not. The author presents here his findings which stretch over a period of roughly 15 years regarding the two situations that were given to (mostly) undergraduate students in economics and business administration at the University of Osnabrueck in Germany. The first situation required that a decision be made between improving the everyday life of a handicapped person and offering education to intelligent children. The second situation required the respondents to take a decision between promoting economic growth at the expense of restricting basic human rights and a slower economic recovery with a full warranty for these human rights. The results show significant changes in the evaluative behaviour of the students over the period considered.