Company: Statistically, China has monitored employee's brain waves and emotions - and boosted one company's profits by $315 million. It can be a good thing for companies to observe on their employees during the pre-employment and employment. As for pre-employment period, companies can ask for medical records of employees to ensure that their insurance costs is not too high. Additionally, reference checks allow the companies to check for authenticity of the information. During employment, it also protects the company against illegal acts. Moreover, it improves productivity in the company, thereby benefitting shareholders. It also ensures accountability in case of any cases of vicarious liability .