In a ruling that brings certainty to employers and employees, this month the Massachusetts Supreme Judicial Court issued two opinions concerning workers' compensation benefits, specifically, the scope of an insurer's lien. Generally, under G.L. c. 152, the workers' compensation statute, most private employers in Massachusetts are mandated to purchase workers' compensation insurance or qualify as self-insured. The law enables employees to receive benefits after on-the-job injuries, but prohibits them from suing their employers. Under Chapter 152, injured employees can recover payment for damages such as medical expenses, rehabilitation costs, and lost wages. However, they cannot recover compensation for pain and suffering.