Learning Contents:                                                             ·           Difference between Extension of Supply and Increase in Supply. Difference between Extension of Supply and Increase in Supply.   Basis     of Difference      Extension of Supply     Increase in Supply   Meaning   When quantity supplied for a commodity rises due to rise in the price, keeping other factors as constant is called an extension of supply.     When supply for a commodity increases due to change in other factors, keeping price as constant is called an increase in supply. Causes Rise in price of the commodity is the sole cause for the extension of supply. Several causes such as: a. Change of firm’s objective from profit maximization to sales maximization. b. Introduction of a new and advanced technology. c. Government grants more subsidies and