*AREC 489F Problem Set #6
*November 24, 2014
*Problem Set 6 do file
*Set directory (tell Stata which folder to use):
*-Problem 1-
use "/users/joshpotash/Downloads/organics_gdp.dta" /Load data file
de
*AREC 489F Problem Set #5
*November 1, 2014
*Problem Set 5 do file
*Set directory (tell Stata which folder to use):
cd C:\Users\LB\Documents\Stata
*-Problem 1-
*1.2
use beauty_hw5.dta /Load data file
u is "mean independent" of x: The mean (expected value) of u is the same
across all slices of the population determined by x
activity; diet; genetics
1.1)
i)
The OLS coefficient estimator, 1-hat and 0
Test Authorization Form
DSS Testing Office
0118 Shoemaker 301.314.7217 / Fax 301.314.9478
University of Maryland, College Park 20742
To be filled out by Student:
Joshua Potash
Student Name: _
AREC489F
Homework #5
AREC 489F
October 28, 2014
Due: 11/03/2014 at 12:00PM sharp.
Reminders: No late homeworks will be accepted. You must show all work to get credit for your
answers. If you work with classmat
AREC 489F, Fall 2014
Homework #8
Due: 12/11 by 12:00PM sharp. No late homeworks will be accepted. You must show all
work to get credit for your answers. If you work with classmates, you are required t
Homework #1
AREC 489F
September 22, 2014
Due: 9/29/2014 at 12:00PM sharp.
Reminders: No late homeworks will be accepted under any circumstances. You must show all
work to get credit for your answers.
Important Terms
The F test compares the SSR across models to gage the importance of including sets of
variables in the regression because the SSR increases when variables are dropped from a
model (thi
AREC 489F, Fall 2014
Homework #6
Due: 11/26/2014 by 11:59PM sharp. Note the time dierence! You can email us copies
of your problem sets if you are traveling.
Reminders: No late homeworks will be accep
AREC 489F: Instrumental Variables
Lint Barrage
December 10, 2014
Barrage (UMD)
AREC 489F
December 10, 2014
1 / 25
Further Notes about IV
IV works for multiple endogenous variables, e.g., y2 and y3 :
y
AREC 489F: The Simple Linear Regression Model
Lint Barrage
September 15, 2014
Barrage (UMD)
AREC 489F
September 15, 2014
1 / 57
Housekeeping
Problem set #1 posted this morning ! Due next Monday (9/15)
JoshuaPotash
ProfessorBarrage
Econometrics
October19,2014
AREC489F:
Problem Set #4
1)NO, it is not the same as conducting four separate hypothesis tests by computing tstatistics. We cannot use individ
AREC 489F: Panel Data Review and Practice
Lint Barrage
December 1, 2014
Barrage (UMD)
AREC 489F
December 1, 2014
1 / 64
Panel Data: Review and Practice
Assume you have data on airfares across city pai
AREC 489F: The Simple Linear Regression Model
Lint Barrage
September 17, 2014
Barrage (UMD)
AREC 489F
September 17, 2014
1 / 73
The Simple Linear Regression Model
Simple linear regression model assume
JoshuaPotash
PROBLEM1
1.1)
1.2)
1.3)
organic_salest = -70.40679+0.0053395
When holding all else equal, for every +1 $billion increase in GDP, organic dairy sales
increase by $0.0053 billion = $5.3 mil
AREC 489F: Instrumental Variables
Lint Barrage
December 10, 2014
Earrage Indra-ID] .IEILHEC 'QF December 1|], Ell'l Further Notes about IV
e IV works for multiple endogenous variables, e-g-, and ya