The academic literature seems to suggest that sell-side analysts are biased. a) What is the nature of this bias? What exactly is biased? b) What

The academic literature seems to suggest that sell-side analysts are biased.

a) What is the nature of this bias? What exactly is biased?

b) What factors does this literature attribute these biases to?

c) If we buy into the story of analyst bias, should we stop listening to analysts? Why, or why not?