Most German universities are public institutions, charging fees of only around €60–500 per semester for each student, usually to cover expenses associated with the university cafeterias and (usually mandatory) public transport tickets. Thus, academic education is open to most citizens and studying is very common in Germany. The dual education system combines both practical and theoretical education but does not lead to academic degrees. It is more popular in Germany than anywhere else in the world and is a role model for other countries.