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Midterm Exam for Econometrics (1): Fall 2014
Prof. Tae-Hwan Kim

1. [50 points] For a randomly selected 5 families, the following observations have been collected in the table and summary statistics are provided below the table. Note that the total number ( ) of observations is 5.

Family
( )
Airline Travel ($100)
( )
Income ($1000)
( ) 1 3 20 2 15 45 3 15 49 4 20 60 5 40 95
, , ,
, , ,
Use ¡®Airline Travel¡¯ as the dependent variable and ¡®Income¡¯ as the only explanatory variable (i.e. there is no constant in this regression). Compute the OLS estimate for the slope.
Discuss the consequences of not including the constant term in the regression.
Predict the Airline Travel consumption of a family whose annual Income is $65,000.
Discuss whethe¡¦(»ý·«)

2. [25 points] Consider the following DGP:

3. [25 points] Consider the following DGP:



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