Janos Kornai and his memorable work.

Janos Kornai was the most outstanding economist from the socialist and post-socialist region in the last 50 years. He was a world-renowned scholar who left behind an immense legacy of works published in over 20 languages. His theory of systemic disequilibrium in a centrally planned economy, the concept of hard and soft budget constraints, and economic shortage were of revolutionary importance to the scientific interpretation of the processes of production, distribution and capital accumulation in state socialist economies. Also of note is the author's work on political economy of socialism, which he taught at the Harvard University. When analysing the socialist system, Kornai essentially contented himself with a descriptive approach, whereas in works published after 1989 he focused his attention on normative economics, suggesting directions of structural reform, institution-building, and economic policy in post-socialist transition. Also of great importance is Kornai's last book comparing the disequilibrium characterised by shortage in socialism with the disequilibrium typical of the surplus in capitalism. This article analyses the evolution of this outstanding economist's theoretical thought and its impact on real economic processes. [ABSTRACT FROM AUTHOR]