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 This contains detailed descriptions of the various Apollo functions, and numerous examples are available at 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
    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.

Experiment design with Apollo

Post Reply
Posts: 1
Joined: 18 Dec 2020, 16:48
Location: Washington DC

Experiment design with Apollo

Post by parthum »

Hello! Great program, have really enjoyed working through the examples. I am curious if there is, or has been, discussion on experiment design in the context of designing choice experiments (surveys) and efficient (D, S, etc.) fractional designs. Other programs (e.g., Stata's DCREATE) is limited in the functional form of the utility function and it seems that this could be a natural application for Apollo's framework. Thanks in advance!
Posts: 179
Joined: 24 Apr 2020, 17:54

Re: Experiment design with Apollo

Post by dpalma »


Thank you for your kind words. We are glad that you like Apollo.

We are constantly considering new functionality. We thought about efficient designs, but that would depart a bit from the core objectives of Apollo, i.e. estimation and application of discrete choice models. So I am afraid that -at least in the medium term- experimental design is not coming to Apollo.

For experimental design I would recommend using Ngene (if you have access to a license). Free R alternatives include the package idefix and DCEtool.

Best wishes
Post Reply