For the workshop "The Lab in the Model, the Model in the Lab: The New Frontiers of Experimental and Computational Research on Social Behaviour", which takes place on March 16th, Prof. Matthias Meyer and Jannick Plaehn have been invited to present the research they worked on together with Kai G. Mertens and Lucia Bellora-Bienengraeber. The research integrates experimental and computational approaches to explore the dynamics of a social norm of honesty in a participative budgeting setting.