The introduction to the issue is:
Edmonds, Bruce (2015) 'Using Qualitative Evidence to Inform the Specification of Agent-Based Models' Journal of Artificial Societies and Social Simulation 18(1):18 <http://jasss.soc.surrey.ac.uk/18/1/18.html>.This is the culmination of the workshops and special sessions of "Social Simulation" (ESSA) conferences on the subject. Many thanks to all who contributed!