The FTC recently terminated a lengthy post-merger investigation of Pediatrix Medical Group, a national neonatology physician group. David A. Argue and Barry C. Harris worked with Sidley & Austin, Hogan & Hartson and Kaye Scholer to analyze several aspects of competition by these hospital-based physicians, including market definition and structure, competitive dynamics, post-merger price changes and potential remedies. They argued for a national market with competitive discipline provided by hospitals and managed care plans. Their econometric analysis showed that post-merger prices rose in line with competitive benchmarks.