expert-report-class-damages

name	expert-report-class-damages
title	Expert Report on Class Damages
description	Drafts a litigation-ready expert report on class-wide damages for class action proceedings. Structures analysis to satisfy Daubert/FRE 702 admissibility and FRCP 23(b)(3) predominance. Use when retaining or preparing a damages expert for class certification, merits, or trial phases.
author	CaseMark
author_url	https://github.com/CaseMark/skills/tree/main/skills/legal/expert-report-class-damages
license	Apache-2.0
version	0.1.0
execution_mode	open
jurisdiction	us
practice	litigation
language	en
tags	["analysis","drafting"]

Expert Report on Class Damages

Produces a court-ready expert damages report demonstrating class-wide measurability of harm under a common methodology, structured to survive Daubert challenge and support FRCP 23(b)(3) certification.

Prerequisites

1. Class definition and complaint — allegations, liability theories, relief sought
2. Engagement scope — retention letter specifying opinions requested and exclusions
3. Damages evidence — transaction records, financial statements, pricing data, surveys, or defendant-produced databases
4. Expert CV — credentials, publications, prior testimony history
5. Opposing expert reports (if any) — to distinguish competing methodologies
6. Legal authorities — jurisdiction's Daubert/Frye standard; prior rulings on proposed methodology

Quick Start

1. Gather prerequisites above
2. Confirm jurisdiction's admissibility standard (Daubert, Frye, or Sargon)
3. Select primary damages methodology from the methodology table below
4. Walk through each output section in order
5. Run the compliance checklist before finalizing

Output Sections

1. Title Page

Field	Content
Court & case caption	Full court name, case number, parties
Expert identity	Name, title, firm/institution
Retaining party	Plaintiff / Defendant / Neutral
Report date	Date of signing
Confidentiality designation	Per applicable protective order

2. Introduction & Engagement Scope

• Identify the putative class, claims, and relief sought
• State questions addressed:
  • Can damages be measured class-wide using common evidence?
  • What is the aggregate class-wide damages amount?
  • Do individual damages issues predominate over common ones?
• Explicitly state what is not in scope (liability, causation, individual allocation) to limit deposition exposure

3. Expert Qualifications

Tie credentials directly to the methodology used — generic backgrounds invite Daubert attack.

Category