7:37 a.m.
Hi, sorry for this e-mail, but I have not found any other way to find this
answer.
I am an economics student from Finland that are using Gretl, and finding it
useful tool to analyze data.
We were wondering if Gretl had a function for dividing groups into low and
high respondents, in other word we want to test a part of a population (in
OLS) who have marked the highest scores in a survey. We want to test this
against other answers in the same survey, but are in doubt that Gretl
understands that person 1 is the same person when we change the order of
respondents by sorting them in the dependent value and then setting the
range to half of the population .
I would really appreciate an answer, thank you.
Best regards
Antti Erkkison
2:11 p.m.
22.04.2013 09:37, Antti Erkkison:
Hi, sorry for this e-mail, but I have not found any other way to find
this answer.
I am an economics student from Finland that are using Gretl, and
finding it useful tool to analyze data.
We were wondering if Gretl had a function for dividing groups into low
and high respondents, in other word we want to test a part of a
population (in OLS) who have marked the highest scores in a survey. We
want to test this against other answers in the same survey, but are in
doubt that Gretl understands that person 1 is the same person when we
change the order of respondents by sorting them in the dependent value
and then setting the range to half of the population .
Hi,
if u r sorting the dataset as a whole the unit identifiers r sorted as well.
If u have a unit and time dimension u'd better use the panel option for
defining the dataset structure.
If u r working with matrices in the first column the unit identifiers
need to present and r then sorted along with the variable of interest.
Cheers
Pindar
I would really appreciate an answer, thank you.
Best regards
Antti Erkkison
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2:42 p.m.
On 22/04/13 09:37, Antti Erkkison wrote:
Hi, sorry for this e-mail, but I have not found any other way to find
this answer.
I am an economics student from Finland that are using Gretl, and
finding it useful tool to analyze data.
We were wondering if Gretl had a function for dividing groups into low
and high respondents, in other word we want to test a part of a
population (in OLS) who have marked the highest scores in a survey. We
want to test this against other answers in the same survey, but are in
doubt that Gretl understands that person 1 is the same person when we
change the order of respondents by sorting them in the dependent value
and then setting the range to half of the population .
I would really appreciate an answer, thank you.
Best regards
Antti Erkkison
You may define a dummy variable that takes value 1 for the individuals
who are in a group defined by a restriction. For example,
<hansl>
open data3-11.gdt
high=(SALARY>80) #This defines the variable with value 1 for professors
with Salary>80 and 0 for the rest.
#and then you may use graphics as:
plot SALARY high --factorized
gnuplot SALARY YEARS high --dummy
#or use the variable "high" in a regression:
ols SALARY const YEARS high
</hansl>
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Pindar