Uses of minimum prices
Many countries have a minimum wage. In terms of commodities and food, a government may set a minimum guaranteed price (MGP) for a particular commodity. This means that producers know in advance that they will receive a certain price per kilo no matter how much is provided. This then acts as an incentive for producers to supply sufficient quantities of the commodity.
They might also be set by retailers in order to deter consumption. For example, Scotland plans to impose a minimum retail price for alocohol which is designed to make it less affordable and so reduce consumption
Minimum Prices on a supply and demand diagram
Advantages on minimum prices or MGP
Disadvantages of minimum prices