The Seventh Schedule of the Indian Constitution divides powers between the Union and State governments into three lists: Union List, State List, and Concurrent List.
Union List: Subjects on which only the Parliament can make laws (e.g., United Nations Organization, Foreign Loans, Defence, Railways, etc.).
State List: Subjects on which only the State Legislatures can make laws (e.g., Police, Public order, Fisheries, Agriculture, Local Government, etc.).
Concurrent List: Subjects on which both the Parliament and State Legislatures can make laws (e.g., Economic and Social Planning, Education, Forests, Marriage and Divorce, Trade Unions, etc.). In case of a conflict, the law made by the Parliament generally prevails.
Therefore, "Economic and Social Planning" is explicitly mentioned as an item in the Concurrent List.