Inflation is defined as the rate (%) at which the general price level of goods and services is rising, causing purchasing power to fall. This is different from a rise and fall in the price of a particular good or service. Individual prices rise and fall all the time in a market economy, reflecting consumer choices or preferences and changing costs. So if the cost of one item, say a particular model car, increases because demand for it is high, this is not considered inflation. Inflation occurs when most prices are rising by some degree across the whole economy. This is caused by four possible factors, each of which is related to basic economic principles of changes in supply and demand
