Back to the ex? Rehiring as an underestimated opportunity for companies

The labor market is highly competitive, qualified experts are scarce, and many sectors are facing an increased willingness among their employees to change jobs. Everybody is talking about recruiting and employee retention, but the opportunity to rehire former employees may hold underestimated potential. What motivates people to return to their former employer? How can a company keep in touch with its former employees? And if you actually return, how much has the working environment you were previously used to changed?
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