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The attached zip has the examples and data files from Wooldridge, Introductory Econometrics: A Modern Approach, 4th edition, Southwestern Publishing, 2009. Most of the examples are relatively simple RATS programs. The main emphasis in the book is on choosing the specification for a linear regression model and interpreting the results, so many of these (until roughly page 250) are a DATA instruction, perhaps a few SET instructions for transformations, and one or two LINREG instructions for doing the regressions. Those examples won't make much sense unless you're following along in the book, since the main point is the discussion in the book about why these particular regressions are being chosen. The later examples are still generally fairly simple RATS programs but with more emphasis on choosing the proper statistical method
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