Cost-push inflation occurs when there is a rise in cost of production which will lead a fall in the aggregate supply that will lead to an excess demand condition, contributing to increase in price level. When the cycle becomes cyclical, it will develop as wage-price spiral or price-wage spiral.
Cost-push Inflation Diagram
As seen from the diagram, the rise in cost of production will lead to a fall in aggregate supply from AS0 to AS1 which will create an excess demand condition at P0 which will prompt the rise in price from P0 to P1.
