Developing further the accumulating evidence that self-employment attracts optimists, this paper investigates the relationship between earnings and prior optimism. It finds that self-employed optimists earn less than self-employed realists. Amongst employees, optimists earn more. These results are consistent with biased expectations leading to entry errors. As a test of validity, we find that amongst the married, future divorcees have higher financial expectations but their realisations are no worse, suggesting our optimism measure captures an intrinsic psychological trait associated with rash decisions.
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