Including control variables
Posted: Fri Aug 25, 2006 7:13 am
Hi,
there has been quite a lot of discussion on moderating effects in PLS. However, I'm still unsure how to include a bunch of control or context variables. In OLS, you typically have your hypothesized relation and then there are a number of controls that could have an impact on this relationship. These might include firm relatedness, age, size, experience and so forth that are normally simply added to the regression equation. Some of them might also be dummy variables.
My understanding up to now is that you would have to create an LV for every control measured by just one indicator. This, however, renders new problems: First, constructs shouldn't be measured by just one item and second, this could blow up your required sample size when applying Chin's rule.
What is your opinion?
there has been quite a lot of discussion on moderating effects in PLS. However, I'm still unsure how to include a bunch of control or context variables. In OLS, you typically have your hypothesized relation and then there are a number of controls that could have an impact on this relationship. These might include firm relatedness, age, size, experience and so forth that are normally simply added to the regression equation. Some of them might also be dummy variables.
My understanding up to now is that you would have to create an LV for every control measured by just one indicator. This, however, renders new problems: First, constructs shouldn't be measured by just one item and second, this could blow up your required sample size when applying Chin's rule.
What is your opinion?