h it sits to determine the substantive law that applies to Boonma's claim for intentional it infli 'on of emotional distress. See Amoco Chem. Co. Tex Tin Corp., 925 F. p. 1192, 1202 n. 9 (S.D. ex.1996) (citing Doty Sewall. 908 F.2d 1053, 1063 (1st Cir.1990) (noting "it is well settled" that Erie applies