The book describes, in detail, rigorous and accessible methods for modern data analysis. Traditionally, data analysis was not considered important in model specification and estimation. The theoretical models were estimated against given data. However, currently, the emphasis is on in-depth data analysis before utilising it for model estimation. Utilising the data from developing countries, the authors discuss suitable techniques in different situations.1 After the introductory chapter, the book is divided into the following five parts: Foundation of Data Analysis; Regression and Data Analysis; Analysing Cross-section Data; Regression with Time-series Data; and Simultaneous Equation Models.