> She said the decision stemmed from her first few months at Yahoo, when she was spending a couple of hours every day in the cafeteria talking to any employee who wanted to chat.

Selection bias.

> Mayer decided on the ban after spending months frustrated at how empty Yahoo parking lots were and consulting Yahoo’s VPN logs to see if remote employees were checking in enough.

Confirmation bias.

Both clear examples of cognitive bias: reading into easily accessible data as a proxy for relevant valid data and using it to justify decisions.