Penka Kovacheva

Vice President


  • Los Angeles


Penka Kovacheva coleads Cornerstone Research’s life sciences practice. She specializes in litigation and regulatory investigations within the life sciences and healthcare industries. In addition to being a testifying expert herself, Dr. Kovacheva works closely with academic experts and attorneys, and leads large teams in performing complex economic and statistical analyses on a range of issues within these industries.

In particular, Dr. Kovacheva has extensive experience in:

Antitrust litigation and merger investigations
  • Investigated allegations of anticompetitive delay of generic entry, including alleged reverse payments, product hopping, and noncompete agreements between drug manufacturers
  • Analyzed allegations of price fixing among generic drug manufacturers
  • Examined class certification issues in end-payor and direct purchaser class actions
  • Estimated competitive effects of a vertical merger between a health insurer and a pharmacy benefit manager
Product misrepresentation and product liability matters
  • Assessed the impact of pharmaceutical marketing on prescribers’ behavior and prescription drug sales
  • Analyzed pharmaceutical companies’ drug development decisions
Statistical sampling matters
  • Performed statistical sampling and evaluated sample designs and extrapolation methods to address allegations of Medicare and Medicaid overpayment for healthcare services
  • Assessed the use of sampling to establish liability and damages in False Claims Act matters and government audits of healthcare providers
Intellectual property disputes
  • Analyzed indicators of commercial success and nexus to patent claims in Hatch-Waxman disputes
  • Assessed potential irreparable harm in the context of preliminary injunction motions

The Impact of Pharmaceutical M&A on Innovation


Most-Favored Entry Clauses in Drug-Patent Litigation Settlements


In re Novartis and Par Antitrust Litigation


In re HIV Antitrust Litigation


The Inflation Reduction Act Could Have Unintended Consequences

Press Release

Cornerstone Research Promotes Four to Vice President in Los Angeles, New York, and Washington


United States et al. v. Sava Senior Care Inc. et al.

Press Release

Cornerstone Research Promotes Seven to Vice President and Principal

  • “Fundamentals – Antitrust IP,” American Bar Association’s 70th Antitrust Law Spring Meeting, 7 April 2022
  • Women@ Initiative for “Up-And-Coming” Women Competition Professionals, 17 June 2019
  • “Spikes in Drug Prices: Outrageous or Legitimate?,” Health Care and Pharmaceuticals Committee, American Bar Association Section of Antitrust Law, 29 June 2017