Employee Turnover

To those in my family with  Math Economics degree and friends in the Princeton Economics Department. Is this a subject where one will use high school calculus, the math of change? 

What is the economic damage of losing an employee with knowledge and experience in a business? Factors and impact on calculation. Discuss from hotel chamber maid to genius CEO who made CBS a highly successful network, and is now fired. Cost calculation, please. (I already know what to do about the feminist lawyers who caused this. You do not need to address that question.) 

How does one prevent this damage? If it is by raising salaries, should the above calculation of damage be used in finding the necessary raise? What is the formula for this calculation?

Are there other approaches than increased salaries, such as making the employee feel good at work; protecting the employee from toxic outside demands and attacks, especially by government adversaries? 


Me to a patient: What are you and Jerome, your therapist, working on, these days?
Patient: Jerome is gone. I have a female therapist. This is the third one this year. I am tired of starting over. 

Me: But Jerome just started here. What is your new therapist's name?

Patient: I don't know her name.