We investigate the different ways in which the results of theoretical models can be ‘robust’. We identify three kinds of ‘robustness’: (1) robustness to changes in the model’s idealisations; (2) robustness to changes in the ‘background’ conditions; (3) robustness to changes in the...

In economics, models, rather than theories, seem to be the fundamental units of appraisal and practitioners seem to hold in high esteem the criterion of ‘robustness’. In this paper we shall try to explicate the multifarious notion of robustness, and articulate it on three different...