This paper suggests a mechanism that describes individuals' positive self-image in subjective assessments of their relative abilities. The mechanism assumes individuals have heterogeneous production functions that determine ability as a function of multiple skills; make skill-enhancing investments with the goal of maximizing their ability; and make ability comparisons using their own production function. Within this framework, the paper provides conditions under which there is positive self-image. Positive self-image is increasing in the ease of the task, the number of different skills needed for the task, and the variability of production technologies in the population.
Santos-Pinto, Luís and Joel Sobel.
2005."A Model of Positive Self-Image in Subjective Assessments."American Economic Review,
95(5): 1386-1402.DOI: 10.1257/000282805775014245