How the model works in detail and what its inputs and outputs are can be read in the model_explanation PDF file. This file can be openened with acrobat reader. To run the model yourself, open the rScriptBroekhuizen.txt file and copy the text to a script in R (e.g. using www.rstudio.com). For any questions, please contact c.g.m.oudshoorn@utwente.nl