This study examines whether companies that are allowed to switch to the audit committee from the supervisors can achieve better earnings quality. I compare earnings quality for firms that switch to the audit committee between pre-adoption and post-adoption periods, relative to the corresponding change for a matched sample that retain the supervisors. I find that firms can improve earnings quality after they switch from the supervisors to audit committee. My findings suggest that firms adopting audit committee can embrace shareholder primacy to a larger extent than those that retain the supervisors.