Larbi Alaoui and Christian Fons-Rosen, «Know When to Fold ’Em: The Grit Factor», Universitat Pompeu Fabra: Barcela GSE Working Paper Series (2018).

Gale M. Lucas et al., «When the Going Gets Tough: Grit Predicts Costly Perseverance», Journal of Research in Personality 59 (2015): 15–22; see also Henry Moon, «The Two Faces of Conscientiousness: Duty and Achievement Striving in Escalation of Commitment Dilemmas», Journal of Applied Psychology 86 (2001): 533–40.