The present thoroughly revised and updated edition of Core Economics with Video Lectures is strictly according to the latest syllabus prescribed by the CBSE, New Delhi of Class XII. As in the previous editions, I have kept the treatment as simple as possible and confined the scope of each topic to the requirement of the syllabus. The treatment has been supplemented by the real life examples and numerical illustrations to enhance the understanding of the subject. This book is an outcome of my interaction with a large number of teachers in the Orientation Programmes organised by the CBSE and KVS in various parts of India and by School Associations in UAE and Kuwait. I have taken care of the suggestions and observations made by the teachers. My sincere thanks to them. Goyal Brothers Prakashan