I always get nervous when everything I see appears to be confirmation of some pet theory I have. While this is in fact a property of a theory that is correct, it's also a property of confirmation bias and delusion. Of course, being able to ask the question is a sign that you're not delusional. Or is that just confirmation bias ...
Anyway, Noah Smith has an article that talks about an effect that appears to be confirmation of the information transfer model (ITM). It's called the value premium, and
I'm it's disappearing.
I used the ITM to build a toy model  of stock prices in terms of book value to try to understand the so-called dark matter problem. However, if you consider non-ideal information transfer, prices should fall below their ideal price  (because the solutions to the differential equation act as a bound via Gronwall's inequality). Here's the picture from  (P is price, S is supply of "book widgets", called B in , D is demand, called M in  for market capitalization):
There would be stocks where the realized price (green line) was less than the ideal price (the black line bound). The so-called endowment effect would lead to more ideal information transfer over time if there are more and more trades -- assuming there wasn't some kind of non-ideal behavior leading to a fall in price.
A non-ideal price would be seen as a "value premium", and it would tend to vanish as the market for those stocks became more ideal.