Balkenende retired from active politics at 54 and became active in the private sector as a corporate director and also works as a professor of Governance, Institutions and Internationalization at the Erasmus University Rotterdam since December 2010. During his premiership, his cabinets were responsible for several major reforms to the education system, immigration laws and reducing the deficit following the financial crisis of 2008. He is the fourth longest-serving Prime Minister after World War II and his premiership is consistently regarded both by scholars and the public to have been above average.