To demonstrate equivalent safety for self - driving cars in
a statistically relevant way, the Googles and Audis of the world will need to cover billions of miles autonomously, unfeasible without mass adoption.
We show four
relevant empirical facts: i) the striking ability of the logarithmic averaged earning over price ratio to predict returns of the index, with an R squared which increases with the time horizon, ii) how this evidence increases switching from returns to gross returns, iii) moving over different time horizons, the regression coefficients are constant in a
statistically robust
way, and iv) the poorness of the prediction when the precursor is adjusted with long term interest rate.