Checks are frequently conducted to confirm information found on an employment application or résumé/curriculum vitae. One study showed that half of all reference checks done on prospective employees differed between what the job applicant provided and what the source reported. They are also conducted as a way to further differentiate potential employees and pick the one the employer feels is best suited for the position. Employers have an obligation to make sure their work environment is safe for all employees and helps prevent other employment problems in the workplace.