Prof. Wierzbowski was a speaker on the conference organized by the Ministry of the State Treasury “25 years of economic transformation in Poland”. The conference gathered group of former ministers of privatisation, or ministers of the State Treasury and large number of the presidents and of the largest Polish companies including ARP, Enea, Grupa Azoty, GPW, KGHM, Polish Defence Holding, PGNiG, PGE, PZU etc.