In a market economy, prices and the operation of the price system underpin this interaction; in turn prices act to indicate the likely market value or particular resources. For example, a commodity in short supply but which has a high demand attached to it will have a high price. Alternatively, one which has a high supply and low demand will have a much lower price attached to it. Prices and the self-interest of people and businesses therefore act as a guide to the decisions that have to be taken. The self interest which drives suppliers to allocate resources is called the invisible hand. This invisible hand brings together private and social interests in a harmonious way: this is the fundamental philosophy underpinning the workings of the market economy.
Central planning tends to set numerous goals for the economy that differ from those in a market economy. In a command economy, the scarce resource of human labour in employment is generally greater in proportion when compared to humans employed in market economies. This is because central planning institutions opt for the even distribution of wealth. This is in high contrast to the