An Investigation of Hindsight Bias in Nascent Venture Activity
Entrepreneurs who fail show substantial hindsight bias in recalled success probability
This study provides direct empirical evidence that entrepreneurs exhibit substantial hindsight bias - their recalled probability of success after quitting is significantly lower than what they stated during the venture process. Using longitudinal data from 198 U.S. nascent entrepreneurs, the research demonstrates that self-reported entrepreneurial narratives cannot be trusted as accurate accounts of decision-making.
For the book's argument, this research proves that even entrepreneurs themselves don't accurately remember their own success probabilities. If founders can't reliably report their own past beliefs, then business advice derived from founder interviews is built on systematically distorted data. Biology's advantage is that organisms can't engage in this self-deception.
Key Findings from Cassar & Craig (2009)
- Entrepreneurs who fail show substantial hindsight bias in recalled success probability
- Mean recalled probability (58.8%) is significantly lower than stated probability during process (77.3%)
- Self-reported success narratives from entrepreneurs are systematically unreliable
- Longitudinal methodology reveals biases invisible in retrospective studies