ETI provides its litigation support clients with a broad range of services, including analysis of the economic issues at hand, economic and statistical research and analysis, modeling, assessment and calculation of economic harms and damages, and expert witness testimony. ETI assists its clients with the process of document review and discovery, analysis of other experts' testimony, and preparation for depositions and trial. In addition to providing expert witness services, ETI is often engaged as a consultative expert, serving in a variety of non-testifying roles.

Listed below are cases representative of ETI's Litigation work.
• In re: Cellular Termination Fee Cases - Superior Court of the State of California, County of Alameda, JCCP No. 4332, Case No. RG03114147
  (calculation of economic loss to cellular carriers resulting from early termination by customers, and economic damages due to plaintiffs)
  Client: Plaintiffs (Class Action)
• Thomas v. Global Vision - Superior Court of the State of California, County of Alameda, Case No. RG03-091195
  (calculation of manufacturer’s liability for damages suffered by customers resulting from product defects/deficiencies)
  Client: Plaintiffs (Class Action)
• United States v. SBC Communications, Inc. and AT&T Corp. - United States v. Verizon Communications, Inc. and MCI Telecommunications Corp. – United States District Court, District of Columbia Civil Action Nos.: 1:05CV02102 (EGS); 1:05CV02103 (EGS)
  (economic analysis of extent to which SBC/AT&T and Verizon/MCI mergers result in diminished competition in relevant telecommunications markets)
  Client: National Association of State Utility Consumer Advocates
• Qwest Corp. v. AT&T Corp. - United States District Court, District of Colorado, Case No. 03-F-2084 (CBS)
  (calculation of intrastate/interstate jurisdictional percentages of AT&T 800 traffic and liability for access charge payments to Qwest)
  Client: AT&T Corp.
• Global NAPs Inc. v. Verizon New England, Inc., et al - United States District Court, District of Massachusetts Civil Action No. 02-12489 (RWZ); 05-10079-(RWZ)
  (estimation of liability for payment of intrastate switched access charges)
  Client: Global NAPs
• Voices for Choices, AT&T Communications of Illinois, et al. v. Illinois Bell Telephone Company - United States District Court, Northern District of Illinois Eastern Division, Case No. 03 C 3290
  (appropriate cost standard for pricing unbundled network elements pursuant to 47 U.S.C. §252(d)(1))
  Client: AT&T Corp.
• AT&T Corp. v. JMC Telecom, LLC - United States District Court, District of New Jersey, Civil Case No. 99-2578 (MLC)
  Client: AT&T Corp.
• Orange Communications Ltd. v. The Director Of Telecommunications Regulations, and Meteor Mobile - High Court of Ireland, 1998 No. 12160P
  (basis for the Director’s award of the third mobile telephone license in the Republic of Ireland to Meteor Mobile)
  Client: Meteor Mobile
• Telephone Management Corp. v. State Street Bank and Trust Company - United States District Court, District of Massachusetts, Civil Action No. 97-10993 PBS
  (review of telecom procurement practices and trends, calculation of economic damages)
  Client: State Street Bank and Trust Company