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Mass Torts & Class Actions

When litigation is aggregated, a single verdict or certification ruling can set the value of thousands of claims. IMS helps litigation teams understand how jurors in every venue will react, secure experts who withstand challenges, and build a consistent story that carries from the first bellwether to global resolution.

From early case assessment and class certification through trials, appeals, and settlements, we support clients nationwide in MDLs, coordinated state proceedings, serial litigation, and class actions.

Build a stronger strategy and prevent uncertainty in large-scale litigation.

Class action and mass tort claims multiply litigation risks. One damaging document, an unprepared witness, or an expert excluded under Daubert reverberates across thousands of claims. Bellwether results become the market price for the entire docket. Class certification is a critical juncture that determines whether a case is worth billions or nothing at all.

Venue and audience add further complexity. Juror attitudes toward corporations, product safety, and fairness can vary widely from one jurisdiction to the next. In coordinated and multi-district litigation, themes and evidence may be presented across many cases and venues at once. Plaintiff and defense teams both benefit from a consistent strategy that holds up in each courtroom and at every stage of review.

IMS supports defense attorneys, plaintiff steering committees, corporate counsel, and insurers in matters such as:

  • Pharmaceutical and medical device MDLs
  • Product defect and consumer product mass torts
  • Environmental and toxic contamination claims
  • Large-scale catastrophes, explosions, and industrial disasters
  • Consumer protection, false advertising, and data breach class actions
  • Securities, predatory lending, and financial class actions
  • Antitrust class actions
  • Employment, workers' rights, and civil rights class actions
  • Serial and repeat-plaintiff litigation

Drawing on decades of experience in mass torts and class actions, and more than 70,000 cases overall, IMS partners with clients through all phases of multi-plaintiff litigation. Read more below about how our services work together to elevate legal strategies and strengthen outcomes.

IMS was a major factor in a trial resulting in a multi-million-dollar verdict. We will use them on our next involved trial for the advantage it gives us.

Partner & Civil Litigator

Our expert’s findings aided us in properly evaluating the case, which in turn assisted us in reaching an agreeable settlement of the matter.

Partner, Am Law 200 Firm

FAQs

In a mass tort, themes, expert opinions, and witness testimony presented in one trial can be cited in others. A litigation consultant helps counsel keep that work consistent across venues and proceedings. The consultant coordinates multi-venue jury research, case themes, and witness preparation, and develops trial graphics that can be adapted from one trial to the next. IMS also identifies the scientific, medical, and damages experts whose opinions will carry through the litigation.

Bellwether verdicts are not binding on other claims, but both sides often use them to evaluate the rest of the docket. Effective selection requires understanding how specific plaintiffs, injuries, and fact patterns are likely to be received in each venue. IMS uses mock trials and juror profiling to inform those choices. At each trial, we provide voir dire strategy, witness preparation, courtroom and war room support, and a consistent library of demonstratives.

Courts assess whether common questions predominate and whether injury and damages can be measured across the class in a certification hearing. That analysis typically relies on statisticians, economists, and survey experts. Opposing counsel may challenge their models on methodology, data selection, or fit with the theory of liability, often through Daubert motions. IMS provides experts in econometrics, conjoint and damages surveys, and industry practice, and prepares them for those challenges and for cross-examination.

Surveys are commonly used in consumer protection and false advertising class actions. They measure what consumers understood, relied on, or valued, which bears on materiality, reliance, and class-wide damages. Courts evaluate survey reliability based on factors such as the target population, question design, controls, and sampling methods. IMS designs surveys that follow accepted methodological standards and evaluates surveys offered by opposing parties.

IMS supports pharmaceutical and medical device MDLs, product and environmental mass torts, catastrophic event litigation, consumer protection and data breach class actions, securities and lending class actions, and antitrust, employment, and civil rights matters. We work with plaintiff leadership, defense counsel, corporate legal departments, and insurers.

Juror attitudes toward corporations, product safety, and damages can vary significantly between jurisdictions, even within the same state. These differences can affect which cases are selected for bellwether trials, how themes are framed, and how the parties value the docket. IMS conducts multi-venue jury research so counsel can see those differences before committing to a trial or settlement strategy.