Quote

""All models are approximations. Assumptions, whether implied or clearly stated, are never exactly true. All models are wrong, but some models are useful. So the question you need to ask is not "Is the model true?" (it never is) but "Is the model good enough for this particular application?""
George E.P. Box (2009)

Old Exams

ECON 107 "Introduction to Econometrics" Spring 2010
 Exam 1: Introduction and statistics review
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answer key.
 Exam 2: Twovariable regression
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answer key.
 Exam 3: Multiple regression with crosssection data
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answer key.
 Exam 4: Multiple regression with timeseries data
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ECON 107 "Introduction to Econometrics" Spring 2008
 Exam 1: Introduction and statistics review
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answer key.
 Exam 2: Twovariable regression
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version B,
version C,
answer key.
 Exam 3: Multiple regression with crosssection data
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version B,
version C,
answer key.
 Exam 4: Multiple regression with timeseries data
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answer key.
 Final exam
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answer key.
ECON 107 "Introduction to Econometrics" Fall 2007
 Exam 1: Introduction and statistics review
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answer key.
 Exam 2: Twovariable regression
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answer key.
 Exam 3: Multiple regression with crosssection data
version A,
version B,
answer key.
 Exam 4: Multiple regression with timeseries data
version A,
version B,
answer key.
 Final exam
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answer key.
ECON 107 "Introduction to Econometrics" Spring 2006
 Exam 1: Introduction and statistics review
version A,
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answer key.
 Exam 2: Twovariable regression
version A,
version B,
answer key.
 Exam 3: Multiple regression with crosssection data
version A,
version B,
answer key.
 Exam 4: Multiple regression with timeseries data
version A,
version B,
answer key.
 Final exam
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answer key.
