Federal courts apply the Daubert framework, a reliability-based gatekeeping test that considers testability, peer review, error rate, controlling standards, and general acceptance. State courts vary: many apply Daubert or a close variant, some retain the narrower Frye general-acceptance test, and several use hybrids. For economic testimony the frameworks rarely exclude the discipline; they exclude inputs the record does not support. Attorneys confirm the governing framework against primary sources.
Federal courts apply the Daubert framework, a reliability-based gatekeeping test. The trial judge decides whether the expert's method is reliable and reliably applied to the facts of the case, considering non-exclusive factors such as whether the method has been tested, whether it has been published and peer reviewed, its known or potential rate of error, the existence and maintenance of controlling standards, and its general acceptance in the relevant field. The inquiry extends to technical and other specialized knowledge, including economics, and the court may exclude an opinion connected to the data only by the expert's assertion. The expert witness testimony guide describes the framework in more detail.
Many states apply a Daubert-style reliability framework. A smaller number retain the Frye general-acceptance test, which asks only whether the method is generally accepted in the relevant professional community and does not separately weigh testability or error rates. Several states apply hybrids, some codified in evidence rules, and the frameworks continue to evolve. The Daubert versus Frye post compares the two families, and the jurisdictions hub collects the state pages.
The core methods of forensic economics, projection from documented earnings with published wage growth, worklife tables, replacement cost valuation of household services, personal consumption deductions from expenditure data, and discounting at low-risk yields, are established under either framework. Challenges therefore target application: an earnings base that departs from the tax returns, a growth rate inconsistent with the discount rate, a horizon no table supports, post-event earnings that ignore a documented return to work, a death claim without a consumption deduction, or a lost profits projection for a business with no history and no comparable. Each is a gap between the data and the conclusion, and each is avoidable.
An economist cannot always know at the time of the report which court will hear the case, so the practical rule is to prepare for the most demanding framework that could apply: state every input and its source, use published series and tables the other side can check, show the sensitivity of the result to the contested assumptions, stay within the economist's field, and document the work file. A report built that way is positioned to be examined on the merits under any framework, and the white paper on a defensible damages report sets out the elements in order.
Always confirm the governing admissibility framework for the specific case against primary sources before the report is finalized. The framework can vary by case type, by court within the same state, and over time as the law evolves, and the disclosure guide covers the procedural requirements that run alongside it.
The framework is uniform, but application varies by circuit and by trial judge. Prior decisions in the same district and circuit on economic testimony are informative for preparation.
Usually a question of weight for the trier of fact, provided the economist explains the basis. It becomes an admissibility question when the rate has no stated source or is inconsistent with the growth assumption.
Request a consultation on Daubert vs. Frye: Admissibility in Federal and State Court or call (201) 343-0700. Plaintiff and defense counsel.