The book makes a comprehensive and analytical study of theories of demand, production/cost and determination of price and output of products in different market structures. It also discusses theory of factor pricing and income distribution as wages, rent, interest and profits. Above all, it critically analyses the conditions of economic efficiency and maximum social welfare and causes of market failures. It takes a further lead with this revision by aligning its contents with the prescribed UGC model curriculum and new Choice Based Credit System (CBCS) syllabus.