Dr. A. Royal Edward Williams, Assistant Professor in Economics at Sacred Heart College (Autonomous), Tirupattur, Vellore (Dt.), Tamil Nadu. He is trained in Environmental Economics from Bharathidasan University, and obtained Ph.D. degree under the guidance of Prof. M. Ravichandran, he is a recipient of Fulbright Fellowship Award under the Indo-American Environment Leadership Program in 2004 and Rashtriya Gaurav Award from the Indian International Friendship Society in 2011. The author has gained expertise in Statistical Package for Social Science (SPSS) and Econometrics. He has published one book and many research articles in the refereed Journals (both National and International).