This is the first of a sequence of courses taught in the Department on elementary "econometrics". The second course is Econ 366, Econometrics II.  The aim of both courses is to introduce you to the important ideas associated with econometrics.  The concepts and ideas are extended in more advanced Departmental courses.      “Econometrics” is a separate field in economics, and combines economic theory, statistics, and computer science.  What distinguishes econometrics from statistics is the attention to the failure of many standard assumptions, which arises from the nature of economic relationships and the lack of controlled experimentation.  Our focus is on the classical linear multiple regression model.  We consider how to choose estimation rules consistent with the model under study, on the computer implementation of the techniques to obtain results from empirical applications, and on examining the validity of our assumptions.