Salespeople with the highest annual revenue are those who are the most motivated to help their customers and coworkers; the engineers with the highest productivity and fewest errors are those who do more favors for colleagues than they receive. The highest achieving negotiators are those who focus not only on their own goals, but also on helping their counterparts succeed. Grant also cites research indicating that companies led by CEOs who are 'takers' end up having more fluctuating, volatile returns.