The purpose of this course is to introduce students to the theory and application of econometric methods. It covers the basic tools of estimation and inference in the context of the single-equation linear regression model, and deals primarily with least squares methods of estimation. The course emphasizes the intuitive understanding and practical application of these basic tools of regression analysis, as distinct from their formal theoretical development. Course material is presented predominantly in scalar terms; the use of matrix algebra is confined to summarizing major results and to interpreting output listings of computer software programs.