This book would not have been possible without the contributions of various people. The original impetus to write this book lies in the constant encouragement of Late A. K. Seth at the Department of Commerce, Delhi School of Economics. It continues to drive me to strive for greater heights. I am also indebted to S. R. Khanna, Jawaharlal, Sanjay Jain, K. V. Bhanumurthy, and J. P. Sharma for giving me the opportunity to teach and learn at the Department of Commerce, Delhi School of Economics. I would also like to take this opportunity to thank my friends and colleagues—Kavita Sharma, Ajay Kumar Singh, Neeti Bhasin, Vanita Tripathi, and Abha Shukla—for their constant support and encouragement.
The book has acquired its present form through the intellectual inputs of the reviewers, whose collective wisdom has tremendously improved the quality of content of the book for readers. I owe very special thanks to my students—at both Sri Aurobindo College (Evening) and the Delhi School of Economics—for constantly helping me explore new ideas. In particular, I would like to acknowledge the contribution of Ankit Soni in the preparation of the question bank and the lecture slides.
I would like to thank the team at Pearson—Debbie Dhar, Shabnam Dohutia, Subhasree Patra, Daniel Luiz, Soma Banerjee, Dhiraj Pandey, and Gaurav Jain—for their patient handling of my manuscript and for helping me negotiate difficulties at every step of the way. Last but not the least, this book would not have been possible without the constant support of my family—my parents, whose wisdom has no boundaries; my husband Arvind, who has been a pillar of strength; and my son Anirudh, whose music is the inspiration for all my work. This book has opened several doors for me; I hope it does the same for my readers. Needless to say, I look forward to comments and feedback to improve the future editions of this book.