Search found 248 matches

by christian.nitzl
Mon Jan 04, 2016 4:25 pm
Forum: FAQ (Methodology)
Topic: unclear reviewer's comment on construct validity
Replies: 6
Views: 3494

Re: unclear reviewer's comment on construct validity

Dear Irene, I am not fully sure however it really seems that the reviewer was irritated about your mentioned point. It is exactly as you assume that the correlations are based on the weighted factor scores in PLS. What is disturbing me a little bit is that the reviewer seems to expect that you shoul...
by christian.nitzl
Mon Jan 04, 2016 12:21 pm
Forum: FAQ (Methodology)
Topic: unclear reviewer's comment on construct validity
Replies: 6
Views: 3494

Re: unclear reviewer's comment on construct validity

Hi Irene, I would agree with the reviewer comment. However, I have often seen this mixing of EFA and PLS. Although, reputable researchers advise to avoid mixing results from an explorative factor analysis with a confirmatory factor analysis like PLS-SEM because of the problems of model over-fitting ...
by christian.nitzl
Wed Jul 23, 2014 9:15 am
Forum: PLS Related Literature
Topic: Article
Replies: 304
Views: 225036

Author: Nitzl, Christian Title: Partial Least Squares Structural Equation Modelling (PLS-SEM) in Management Accounting Research: Critical Analysis, Advances, and Future Directions Journal: Working Paper Link: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2469802 Note: This is my new working pap...
by christian.nitzl
Thu Aug 15, 2013 9:35 am
Forum: FAQ (Methodology)
Topic: Test for significant differences between path coefficients
Replies: 6
Views: 4338

By the way, I have an Excel template which you can use for testing the difference. That template is based on the corrected formula by Chin that you can find in my working paper on page 46 (in the orignal formula was a small bug): http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2097324 Best regards,
by christian.nitzl
Thu Aug 15, 2013 9:15 am
Forum: FAQ (Methodology)
Topic: Test for significant differences between path coefficients
Replies: 6
Views: 4338

At the moment I do not know a source for PLS-SEM who exactly matches to your question. However, because regression analysis and PLS-SEM are very similar you can use e.g. following source which refer to a regression analyses: http://www.udel.edu/soc/faculty/parker/SOCI836_S08_files/Paternosteretal_CR...
by christian.nitzl
Tue Aug 13, 2013 7:45 pm
Forum: FAQ (Methodology)
Topic: Test for significant differences between path coefficients
Replies: 6
Views: 4338

Hi, You can use the same approach for testing the difference of two path connections in one single model as you us for path connections in different models. You can use Chin’s test or Henseler’s group test or simple the difference of the bootstrap distribution in an Excel template. Greetings, Christ...
by christian.nitzl
Fri Jul 26, 2013 7:13 pm
Forum: FAQ (Methodology)
Topic: Calculating T-Value for indirect effects: a*b/sd(ai*bi) ?
Replies: 18
Views: 9919

Hi Katja, With help of the bootstraps results from a PLS-SEM program you can easily calculate the CI via assistance of a spread-sheet application, such as Microsoft Excel. That means the results table of the bootstrap subsamples needs to be copied and pasted into a spreadsheet application. To produc...
by christian.nitzl
Fri Jul 26, 2013 2:19 pm
Forum: FAQ (Methodology)
Topic: Calculating T-Value for indirect effects: a*b/sd(ai*bi) ?
Replies: 18
Views: 9919

Hi Katja, For a sample size greater than 30 observations the normal critical values can be used determining the significance levels. Thus, if the t-value is above 1.96, you can assume that the path coefficient is significantly different from zero at a significance level of 5% (error term = 0.05; two...
by christian.nitzl
Sun Jul 14, 2013 2:36 pm
Forum: FAQ (Methodology)
Topic: Interaction effects
Replies: 89
Views: 55731

Yes, that does it mean. If a variable is dependent from another variable I think in the actual version of SmartPLS you cannot properly interpret it. Why should be there a different when the dichotomous dependent variable in turn influences other variables?

Greetings,
Christian
by christian.nitzl
Sun Jul 14, 2013 8:30 am
Forum: FAQ (Methodology)
Topic: Interaction effects
Replies: 89
Views: 55731

Hi, at question a) In the actual SmartPLS version it is not possible using a dichotomous variable as dependent variable. For that case you need a logistic-regression. Therefore in your case a valid interpretation of you model is not promising. at question b) As your question indicates, the question ...
by christian.nitzl
Fri Jun 14, 2013 9:26 am
Forum: FAQ (Methodology)
Topic: dummy variables in SmartPLS
Replies: 4
Views: 1765

What do you mean with a "first-order formativ construct"? If you mean single item measurements as independent variables than I would say "yes".
Greetings,
Christian
by christian.nitzl
Mon Jun 10, 2013 6:44 pm
Forum: FAQ (Methodology)
Topic: dummy variables in SmartPLS
Replies: 4
Views: 1765

In general with help of SmartPLS it is possible to use “single” dummy variable as independent variables. But as far as I know you cannot use more than one dummy variable per construct with the actual implemented algorithms. Furthermore you cannot use a dummy variable as dependent variable. In the la...
by christian.nitzl
Mon Jun 10, 2013 6:33 pm
Forum: FAQ (Methodology)
Topic: how does PLS test the influence of each IV in a model?
Replies: 1
Views: 828

I believe the review refer to the point that PLS as a SEM cannot say something about casual relation. Therefore you need always a good theory or some experimental studies for deriving a model in SEM. Perhaps you can check for your independent variables the VIF (variance influence factor) with help o...
by christian.nitzl
Thu Jun 06, 2013 10:02 am
Forum: FAQ (Methodology)
Topic: A Critical Examination of Common Beliefs About PLS-PM
Replies: 11
Views: 5753

Hi everybody, As an answer I would recommend to read the following two articles: Reinartz, W./Haenlein, M./Henseler, J. (2009): An empirical comparison of the efficacy of covariance-based and variance-based SEM, in: International Journal of Research in Marketing, Vol. 26, No. 4, S. 332-344. Henseler...
by christian.nitzl
Wed May 08, 2013 10:24 am
Forum: FAQ (Methodology)
Topic: Two groups with different numbers of indicators
Replies: 6
Views: 1796

You right, we really need better procedures. But “at least” you need the “same” indicators for the measurement when using a multigroup analyses. In the next step we have to check if the “loadings” are significantly different with such a test you mentioned e.g. “parameter free” test. Greetings, Chris...