Search for Sunk Cost Bias took me to this lovely psychology website !

My favouriate subject . Sunk Cost Bias ! LOL ! 

So, I typed in Google. As expected, it took me to Wikipedia and the list of cognitive biases. I have to read them . They will be very useful in my profession and broadly applicable. 

Besides, it took me to this wonderful site. I must  browse and read in leisure .

https://litemind.com/sunk-cost-bias/