The book comprises three main sections, namely (i) Mathematical Tools, (ii) Econometrics, and (iii) Production Economics. The first section contains eight chapters, numbered 1-8, while the second section consists of six chapters, numbered 9-14. The final section has eleven chapters, numbered 15-26.Each chapter of the book is accompanied by numerous Numerical Illustrations to enhance readers and users understanding of the subject matter. In addition, the book includes some empirical illustrations of the coefficients of Multiple Correlation, Partial Correlation, and Partial Regression, which are presented in two different methods for calculating the coefficient.