Important: Read this before posting to this forum

  1. This forum is for questions related to the use of Apollo. We will answer some general choice modelling questions too, where appropriate, and time permitting. We cannot answer questions about how to estimate choice models with other software packages.
  2. There is a very detailed manual for Apollo available at http://www.ApolloChoiceModelling.com/manual.html. This contains detailed descriptions of the various Apollo functions, and numerous examples are available at http://www.ApolloChoiceModelling.com/examples.html. In addition, help files are available for all functions, using e.g. ?apollo_mnl
  3. Before asking a question on the forum, users are kindly requested to follow these steps:
    1. Check that the same issue has not already been addressed in the forum - there is a search tool.
    2. Ensure that the correct syntax has been used. For any function, detailed instructions are available directly in Apollo, e.g. by using ?apollo_mnl for apollo_mnl
    3. Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
    4. Make sure that R is using the latest official release of Apollo.
  4. If the above steps do not resolve the issue, then users should follow these steps when posting a question:
    1. provide full details on the issue, including the entire code and output, including any error messages
    2. posts will not immediately appear on the forum, but will be checked by a moderator first. This may take a day or two at busy times. There is no need to submit the post multiple times.

Exogenous LV effect on endogenous LV

Ask questions about model specifications. Ideally include a mathematical explanation of your proposed model.
Post Reply
ha.ortiz10
Posts: 4
Joined: 02 Jun 2020, 23:17

Exogenous LV effect on endogenous LV

Post by ha.ortiz10 »

Hi all. Hope you are doing well.

In a typical SEM, you could use an LV as a regressor or independent variable of another LV. I am wondering if in an ICLV this is possible. Can you use an LV as an independent variable of another LV that influences the choice? If so, how would you write it?

I understand that both LVs should need their gamma objective values, but I am curious about how to create the relationship between latent variables.

I imagine something like this in "conceptual" terms, but I do not know if it makes sense:

LV_endogenous = gamma1*X1 + gamma2*X2 + gamma3*X3 + Blv*LV_exogenous + eta_end

LV_exogenous = gamma4*X4 + gamma5*X5 + eta_exo
stephanehess
Site Admin
Posts: 974
Joined: 24 Apr 2020, 16:29

Re: Exogenous LV effect on endogenous LV

Post by stephanehess »

Hi

yes, this is fine, but a few things to take into account:

1 - for the model to be identified, you will need separate measurement model components for both latent variables, i.e. they need to be used with different indicators
2 - you'll need to change the order below, so that exogenous is defined first

Stephane
--------------------------------
Stephane Hess
www.stephanehess.me.uk
Post Reply