In 1963 Ulbricht adapted Liberman 's theories .
In 1963 Ulbricht introduced the New Economic System ( NES ) , an economic reform program providing for some decentralization in decision - making and the consideration of market and performance criteria .
In 1963 Ulbricht adapted Liberman 's theories and introduced the New Economic System ( NES ) , an economic reform program providing for some decentralization in decision - making and the consideration of market and performance criteria .