Guides
Expert evidence, read closely.
How courts treat the expert testimony that decides matters: what draws a Rule 702 challenge, what survives it, and what each side's expert has to show. Every authority is checked against the opinion on CourtListener and listed at the end of each guide.
01Daubert Challenges to Event Studies in Securities CasesHow securities event studies are attacked under Daubert and amended Rule 702: event dates, estimation windows, confounding news, windows and significance.02Price Impact at Class Certification After GoldmanPrice impact at class certification after Halliburton II and Goldman: inflation maintenance, the generic-statement mismatch, and what each expert must show.03Common Impact and Pass-Through at Class CertificationWhat Comcast, Rail Freight and Olean require on common impact, uninjured class members, averaging and pass-through, and how the defense attacks it.04Amended Rule 702 After Nearly Three Years: What Courts ExcludeHow the circuits have applied amended Rule 702's preponderance standard and its basis and application prongs, and what that means for any expert.
See also the expert class library: what each class of expert is retained to answer and how courts have ruled on their testimony.