2002. Since 1989 Sinn has served on the Advisory Council of the German Ministry of Economics, and represented the Free State of Bavaria on the Board of Supervisors of HypoVereinsbank for ten years. In February 2018 his autobiography entitled „Auf der Suche nach der Wahrheit“ (“In Search of the Truth“) was published in German language on the occasion of his 70th birthday. Sinn lives with his wife near Munich. They have three adult children. Research With the exception of his diploma dissertation, also published in a journal, on the Marxian Law of the tendencial decline of the rate of profit, Sinn dealt in his early years particularly with economic risk theory. He made a name for himself with his dissertation "Ökonomische Entscheidungen bei Ungewissheit" (1980), published in English as "Economic Decisions under Uncertainty" (1983), with numerous spin-off articles. Subsequent work focused on the axiomatic basis of mean-variance analysis, on the foundation of the principle of insufficient reason, on the psychological foundation of risk preference functions and on the analysis of risk decisions under limited liability, which he subsequently developed into a theory of bank regulation in his Yrjö Jahnsson Lectures, "The New Systems Competition". In 2003, in the journal FinanzArchiv, he touched off an academic debate on banking regulation in which he was criticised by market-oriented economists for his favouring of stronger banking regulation to prevent excessive risk-taking. With his dissertation in 1977 on excess risk propensity under liability restrictions, Sinn, in the opinion of Martin Hellwig, preceded the pioneering analysis of Stiglitz and Weiss of 1981. His work in this area was again published as a reprint volume in 2008. On the basis of his research on risk theory, Sinn developed his influential theory of the insurer state, in which he interpreted the redistributing activity of the state via the tax-transfer system as insurance protection, showing that this activity can have a favourable influence on people's willingness to take productive risks. His work on the Theory of the Welfare State in 1995 is considered an important contribution on the legitimacy of state redistribution activity. Sinn has published numerous studies on the theory of economic cycles, environmental economics, foreign trade issues, including ones on the so-called asset approach and on the micro foundations of a model of temporary general equilibrium. Problems of longer-term economic growth were also on his research agenda. Sinn was the first economist to formulate the central-planning