Individual proportion on R2

Questions about the implementation and application of the PLS-SEM method, that are not related to the usage of the SmartPLS software.
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Hansson
PLS Junior User
Posts: 3
Joined: Thu Aug 13, 2015 7:21 am
Real name and title: Johannes Gamel

Individual proportion on R2

Post by Hansson »

Hello Community,

does SmartPLS allows conclusions about the individual proportion of an exogenous latent variable on the R2 of the endogenous latent variable by removing the variable of the equation model and tracking the difference in R2? Would this approach be methodologically correct?

Thanks a lot!!!
jmbecker
SmartPLS Developer
Posts: 1282
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: Individual proportion on R2

Post by jmbecker »

We provide the f² value which is very similar to your approach: It takes the individual contribution R² included - R² excluded and then divides this number by 1- R² included. Thus, it is the individual R² contribution relative to the unexplained variance.

You may not want to calculate such a number yourself, because in PLS you are changing the whole model context when deleting a construct. Thus you may get strange results if you really delete the construct and not calculate the difference based on a fixed model.
Dr. Jan-Michael Becker, BI Norwegian Business School, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
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