Re: Quantile Regression in SPSS 26 (could someone help?)

Posted by Jon Peck on Feb 09, 2020; 8:27pm
URL: http://spssx-discussion.165.s1.nabble.com/Quantile-Regression-in-SPSS-26-could-someone-help-tp5738837p5738838.html

There are two quantile regression procedures  available in Statistics V26.  The QUANTILE REGRESSION procedure is built in and should be used rather than the older SPSSINC QUANTREG extension command available via Extensions > Extension Hub with one exception.

To get a better understanding of quantile regression, start with the case study in the help system (Help > Table of Contents > Case Studies > Standard Edition > Quantile Regression (https://www.ibm.com/support/knowledgecenter/en/SSLVMB_26.0.0/statistics_casestudies_project_ddita/spss/tutorials/quantile_regression.html)

You might also look at

Journal of Economic Perspectives—Volume 15, Number 4—Fall 2001—Pages 143–156   Koenker and Hallock, Quantile Regression

The exception I referred to above is that the QUANTILE REGRESSION procedure does not include a way to test whether the the various quantile lines actually have the same slope and, therefore, ordinary regression will suffice.  (Starting with ordinary regression is probably a good idea, anyway).  The SPSSINC QUANTREG procedure does provide such a test.

On Sat, Feb 8, 2020 at 7:35 PM Marcos Colla <[hidden email]> wrote:

I would like to apologize for my limitation in English, so, if I say
something wrong or something that you cannot understand I ask you to please
forgive me. I'm a master’s degree student in the Master Program in
Production and Systems Engineering and I'm working hard in my master thesis.
My research project is focused on understanding the ambulances response time
(dependent variable) in the local Emergency Medical System. After sistematic
literature review I found the interesting possibility of quantile regression
(available on SPSS 26). So,  I need to understand the change in a specific
percentile of dependent variable caused by changing a independent variable
(e.g. hour of the day, day of the week and many others). I'm trying to find
a step by step to use quantile regression on SPSS 26. Somebody can help me,
please?



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