Are exit interviews a worthwhile procedure for HR departments?

Although
many human resources departments conduct exit interviews, I would argue that they are not
worthwhile.  My main reason for saying this is that there is no reason to believe that they will
yield authentic results.

An exit interview is typically conducted when an
employee is leaving a firm.  That employee may have been laid off, may have been fired for
cause, or may have resigned to pursue another job opportunity.  HR...