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2.5 Replication of econometric studies (Page 4/10)

Definition of the variables included in the vanderbilt data set.
Column	Code	Variable definition
A	Obs	Observation number
B	SID	Student ID
C	Grade	Grade earned in Economics 231, A = 4, A- = 3.7, etc.
D	SelCorr	Variable correcting for selection bias
E	Soph	Dummy variable = 1 if student is a sophomore
F	Senior	Dummy variable = 1 if student is a senior
G	Same	Dummy variable = 1 if student took both intermediate classes the same year
H	Skip	Dummy variable = 1 if student took the intermediate classes at least one semester apart
I	HighestMath	Highest level of math attained (the dependent variable, 0-6 corresponding to Math 170, 171a, 172a, 171b, 172b, 221a, 221b)
J	M170	Dummy variable = 1 if student's highest level of math was Math 170
K	M171a	Dummy variable = 1 if student's highest level of math was Math 171A
L	M172a	Dummy variable = 1 if student's highest level of math was Math 172a
M	M171b	Dummy variable = 1 if student's highest level of math was Math 171b
N	M172b	Dummy variable = 1 if student's highest level of math was Math 172b
O	M221a	Dummy variable = 1 if student's highest level of math was Math 221a
P	M221b	Dummy variable = 1 if student's highest level of math was Math 221b
Q	GE100	Grade in Economics 100
R	GDE100	Individual instructor grade deflator in Economics 100
S	GE101	Grade in Economics 101
T	GDE101	Individual instructor grade deflator in Economics 101
U	GDE231	Individual instructor grade deflator in Economics 231
V	Size	Class size
W	FGPA	Freshman GPA
X	Female	Dummy variable =1 if student is a female
Y	MSAT	Score on Math section of the SAT
Z	VSAT	Score on Verbal section of the SAT
AA	TE231	Teacher of Economics 231 (numerical code)
AB	SE231	Section of Economics 231 (numerical code)
AC	GM170	Grade in highest math class: Math 170
AD	GM171a	Grade in highest math class: Math 171a
AE	GM172a	Grade in highest math class: Math 172a
AF	GM171b	Grade in highest math class: Math 171b
AG	GM172b	Grade in highest math class: Math 172b
AH	GM221a	Grade in highest math class: Math 221a
AI	GM221b	Grade in highest math class: Math 221b
AJ	GHM	Grade in highest math class
AK	Foreign	Dummy variable = 1 if student passed foreign language proficiency test
AL	EMEcon	Dummy variable = 1 if expected major is economics
AM	EMOSS	Dummy variable = 1 if expected major is another social science
AN	EMNS	Dummy variable = 1 if expected major is a natural science
AO	EMH	Dummy variable = 1 if expected major is in the humanities
AP	AM1	Dummy variable = 1 if student completed 1 year of advanced math in high school
AQ	AM2	Dummy variable = 1 if student completed 2 years of advanced math in high school
AR	AM3	Dummy variable = 1 if student completed 3 years of advanced math in high school
AS	Phy1	Dummy variable = 1 if student completed 1 course in physics in high school
AT	Phy2	Dummy variable = 1 if student completed 2 courses in physics in high school
AU	Chem1	Dummy variable = 1 if student completed 1 course in chemistry in high school
AV	Chem2	Dummy variable = 1 if student completed 2 courses in chemistry in high school

Replication of the ordered probit regression

At this point we are ready to begin the replication. Since it is easy to get lost in the process, I have created a list of steps that include both instructions on what to do and questions you need to answer. As part of this exercise you will be asked to complete several tables of results. In order to make this effort easier, I have provided a MS Word file, Tables for ordered probit discussion.doc , with the tables to be completed in it.

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Read also:

OpenStax, Econometrics for honors students. OpenStax CNX. Jul 20, 2010 Download for free at http://cnx.org/content/col11208/1.2

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