Injured journeyman electrician's pension payments were result of normal pension retirement benefits, and wholly unrelated to the claimant's workers' compensation accident. Thus, those pension payments cannot entitle employer to a credit against its liability under Workers Compensation Act. A wage differential award is determined by comparing claimant's prior earning capacity to amount he is earning or is able to earn in some suitable employment after the accident. A claimant's voluntary decision to remove himself from the workforce does not preclude a wage differential award. (HOLDRIDGE and HUDSON, HARRIS, and STEWART, concurring.)