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Hello again SIMSOC, I just wanted to briefly thank the large number of people who replied to my original email. Some really interesting points have been raised; all of which have given me and my co-authors a lot to think about. I’m going to spend a few days considering and collating the responses, and will provide some kind of summary which I hope might be of use to others. I also should just briefly add, in case it wasn’t entirely clear in the first email, that in the context of *this particular paper* I think the reviewer’s comments are perfectly reasonable. Whilst we wont be able to validate this model to the extent that some empirical models have been, I agree with the reviewers that some kind of validation is necessary. All the best, Nick — Dr Nick Malleson Room 10.114 (Manton building) School of Geography, University of Leeds [log in to unmask] http://nickmalleson.co.uk/ 0113 34 35248 > On 12 Sep 2018, at 08:03, Nicolas Malleson <[log in to unmask]> wrote: > > Hi SIMSOC, > > I was wondering if anyone has any thoughts/advice about a difficulty that I’m having with validating a model. This is in response to (very fair) comments by reviewers on a paper that is under review, so I will talk about the problem in general terms. I think the discussion should be of interest to others on the list. > > Colleagues and I have built a spatially-realistic agent-based model with agents who move around. It’s based on a real urban area. We have used an a-survey to calibrate the behavioural parameters, such that the agents behave in a way that is consistent with the results of the survey. The survey is national, so not specific to our study area. We put the agents into a virtual environment, let them go, and see what happens. > > The reason for creating this model in the first place is that we have no data on the spatial behaviour of the real individuals in our study area. So we’re hoping that by implement behaviour that is consistent with the results of the survey, the agents will give us some insight into the real dynamics of the case study area. > > But how do we validate the model? Assume that there are no empirical data available for our study area (it is possible to try to stand on the road and talk to people, but this is probably out of scope). What should an aent-based modeller do when they have an empirical model but no empirical validation data?? > > All the best, > Nick > > > > > — > Dr Nick Malleson > Room 10.114 (Manton building) > School of Geography, University of Leeds > [log in to unmask] > http://nickmalleson.co.uk/ > 0113 34 35248 > ######################################################################## To unsubscribe from the SIMSOC list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=SIMSOC&A=1