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With reference to Behavioral Asset Pricing models, I know that the discount factor (or required rate of return) is equal to:

Discount rate = Risk-free rate + Fundamental risk premium + Sentiment risk premium

The first 2 components are the same as in Traditional Finance.

Sentiment Risk Premium, which should capture "not-so-rational" beliefs not captured by other factors, can be proxied by the dispersion of analysts' forecasts. However I couldn't find a paper getting more specific on the calculation of the Sentiment Risk Premium.

Anyone knows about a model/formula for computing the Sentiment Risk Premium?