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DITCH --- A Model of Inter-Ethnic Partnership Formation

Ruth Meyer, Laurence Lessard-Phillips, Huw Vasey
Submitted By: RuthMeyer
Submitted: Nov 5, 2014
Last Updated: Feb 2, 2016
334 Downloads (23 Downloads in the last 3 months)
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Inter-ethnic marriage is both a cause and a consequence of immigrant integration. It is, however, unclear how individual preferences and opportunities for contact may combine to produce the spectrum of rates of inter-ethnic marriage we observe in the UK and elsewhere. The DITCH (“Diversity and Inter-­ethnic marriage: Trust, Culture and Homophily”) model has been designed to explore inter-ethnic marriage, but also to move towards adding layers of sophistication to the way such processes have previously been modelled. Utilising research and evidence from quantitative and qualitative sources from across the social sciences, we seek to develop a complex model of emergent processes of differentiation and change in the marriage patterns and social cohesion of migrant communities.

Our approach with developing the DITCH model has been to start with a simple model that includes only processes and data essential to modelling (inter-ethnic) partnership formation, but which can be easily extended when necessary. The model version 1.0 is therefore constrained to simulating a cohort of single (at model initialisation) agents aged 18 - 35 years who search for a suitable partner within their social network.

This model is associated with a publication:

Meyer, R., Lessard-Phillips, L. and Vasey, H. (2014) DITCH: A Model of Inter-ethnic Partnership Formation. In: Proc. of Social Simulation 2014: 10th Conference of the European Social Simulation Association, Barcelona, Spain, 1-5 September, 2014.

Cite This Model:
Meyer, Ruth, Lessard-Phillips, Laurence, Vasey, Huw (2014, November 5). "DITCH --- A Model of Inter-Ethnic Partnership Formation" (Version 1). CoMSES Computational Model Library. Retrieved from:

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Model Version: 1
Version Notes:

Platform: NetLogo 5.0.3
Programming Language: Logo (variant)
Operating System: Platform Independent
Licensed Under: Academic Free License 3.0
Instructions on Running This Model:
This model requires the NetLogo extensions array and pathdir. While array comes prepackaged with NetLogo, you will need to install the pathdir extension for NetLogo v.5. This can be downloaded from

Model Files
Available Model Versions
Version Number Submitted
1 11/5/2014
2 02/2/2016
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