In: Economics
The sustained rise in the general price level is called inflation. it is usually said that businessmen tend to raise the level of price to increase the profits of firms. But it is not fully true, the firm can not determine the price level arbitrarily. The elasticity of demand and supply also play a critical role in the determination of price level.
Demand-pull and cost-push factors actually decide the level of the price level. Increase in the demand and fall in the supply cause the rise in the price level:
Demand-pull:
Cost-push inflation: