Background and terminology New non-Communist governments in several Eastern European countries include Yugoslavia,Hungary;Poland;Czechic, Slovenia;Romania;Bulgaria etc. Factors affecting prices include supply and demand,production cost,changes in consumption habits,and restrictive practices of monopolies,trusts,and cartels,etc. 贵价爱，所質易大孝Background and terminology Background and terminology New non New non -Communist governments in several Communist governments in several Eastern European countries include Eastern European countries include Yugoslavia, Hungary; Poland; Czechic, Yugoslavia, Hungary; Poland; Czechic, Slovenia; Romania; Bulgaria etc. Slovenia; Romania; Bulgaria etc. Factors affecting prices include supply and Factors affecting prices include supply and demand, production cost, changes in demand, production cost, changes in consumption habits, and restrictive practices consumption habits, and restrictive practices of monopolies, trusts, and cartels, etc. of monopolies, trusts, and cartels, etc