BOSTON - A First Circuit U.S. Court of Appeals panel affirmed a lower court decision on Feb. 26 and said that the preclusive effect of a prior arbitration is for the arbitrators to determine, not the court (Employers Insurance Company of Wausau, et al. v. OneBeacon American Insurance Company, et al., No. 13-1913, 1st Cir.; 2014 U.S. App. LEXIS 3613).