Problem Set #3 (1) Suppose a researcher ran a regression of infant birthweight (in ounces), denoted BirthWeight, on the number of cigarettes the mother smoked per day while pregnant (Cigs). She obtained the following regression results: ^ BirthW eight = 1
Problem Set #1 (1) The following table gives the joint probability distribution p(X, Y ) of random variables X and Y .
Y 1 2 3 4
1 .02 .03 .04 .09
X 2 .04 .18 .04 .18
3 .08 .04 .08 .18
Determine the following: (a) Do the entries of the table satisfy the c
Problem Set #5
(1) Stock and Watson, 4.2 parts (a), (b) and (c).
Note: for part (b), you are asked to calculate the p-value associated with the two-sided
test that the coecient on male equals zero. To do this, rst calculate the value of the
Economics 472 Lab Outline
1. Go to the course website http:/www.econ.iastate.edu/classes/econ371/tobias/ and click on the link for the California Test Score data in text format. (You can find this under the "Lab Materials" section). You might also want to
Economics 371 Problem Set #4 (1) Consider the regression of y on just a constant term : (no x included) yi = 1 + ui .
(1a) Show that the OLS estimate of 1 is just the sample mean of y: 1 = y. (Hint: Minimize
u2 = i
n i=1 (yi
1 )2 by choosing 1 . Si
Economics 371 Problem Set #7 (1) Using data from the course website (under the link related to the production function data), run a regression of log output on log labor and log capital (i.e., estimate the Cobb-Douglas production function). To do this, fi
Economics 371 Problem Set #10 (1) Consider a simple model to estimate the eect of personal computer ownership (denoted PC) on college grade point average (GPA): GP Ai = 0 + 1 P Ci + ui . In this model, PC is a binary variable taking the value 1 if the stu
Economics 371 Problem Set #6 Note: For all of the computer-based exercises, please include the regression output (you dont need to include any graphs) with your completed problem set. (1) Load the California schools data into STATA and perform the multipl
Economics 371 Final Problem Set The nal problem set for the course asks you to write a small (ideally between 4 and 5 pages) empirical paper. In this paper, you are to perform and correctly interpret the output from a regression analysis. The topic for th