Rationing of the country, through the 'levelling of consumption of essential foodstuffs'. To assist with rationing, ration books were introduced on 1918 for butter, margarine, lard, meat and sugar. During the war, average calories intake decreased only three percent, but protein intake six percent. Food rationing appeared in Poland after the First World War, and ration stamps were in use until the end of the Polish–Soviet War. Rationing became common during the Second World War. Ration stamps were often used. These were redeemable stamps or coupons, and every family was issued a set number of each kind of stamp based on
Rationing non-price rationing. For example, scarce products can be rationed using queues. This is seen, for example, at amusement parks, where one pays a price to get in and then need not pay any price to go on the rides. Similarly, in the absence of road pricing, access to roads is rationed in a first come, first served queueing process, leading to congestion. Authorities which introduce rationing often have to deal with the rationed goods being sold illegally on the black market. Rationing has been instituted during wartime for civilians. For example, each person may be given "ration coupons" allowing him