Practical and professional, Wooldridge's INTRODUCTORY ECONOMETRICS: A MODERN APPROACH, 4e bridges the gap between how undergraduate econometrics has traditionally been taught and how empirical researchers actually think about and apply econometric methods. The text's unique approach reflects the fact that econometrics has moved from a specialized mathematical description of economics to an applied interpretation based on empirical research techniques. The text combines the mechanics of econometrics with modern applications of econometrics by employing a systematic approach motivated by the major problems facing applied researchers today. Unlike traditional texts, INTRODUCTORY ECONOMETRICS's unique organization separates topics by the kinds of data being analyzed, rather than presenting a strictly linear model. Packed with relevant applications and a wealth of interesting data sets, the text emphasizes examples throughout, which gives a concrete reality to economic relationships, as well as allows treatment of intriguing policy questions in a realistic and accessible framework.