\"Econometrics is too mathematical; it' s the reason my best friend isn' t majoring in eco-nomics.\"
　　\"There are two things you are better off not watching in the making：sausages and economet-ric estimates.\"
　　\"Econometrics may be defined as the quantitative analysis of actual economic phenomena.\"
　　\"It's my experience that 'economy-tricks' is usually nothing more than a justification of what the author believed before the research was begun.\"
　　Obviously，econometrics means different things to different people.To beginning students，it may seem as if econometrics is an overly complex obstacle to an otherwise useful education.To skeptical observers，econometric results should be trusted only when the steps that produced those results are completely known.To professionals in the field，econometrics is a fascinating set of techniques that allows the measurement and analysis of economic phenomena and the prediction of future economic trends.
　　You're probably thinking that such diverse points of view sound like the statements of blind people trying to describe an elephant based on which part they happen to be touching，and you' re partially right.Econometrics has both a formal definition and a larger context.Although you can eas-ily memorize the formal definition，you' 11 get the complete picture only by understanding the many uses of and alternative approaches to econometrics.

　　于永娟，1978年生，山东潍坊人，经济学博士，副教授。具有多年的高校教学管理和双语教学经验。近年来主持质量工程项目和教改课题6项，主持省部级科研课题5项，主研国家社科和省部级以上课题6项，主持横向课题多项；在CSSCI和SSCI等核心期刊发表论文20余篇，参编省部级规划教材8部；研究成果获多项奖励。
　　
　　何悦，1988年7月生，重庆涪陵人，博士。毕业于四川农业大学农业经济管理专业，现为长江师范学院财经学院讲师，主要从事绿色农业、农户生产行为等方面的研究。主持和主研国家、省部级课题10余项；在《经济纵横》、《财经科学》等期刊公开发表文章20余篇。