Hours-per-Dollar: Ranking 50 Online Courses by Real Curriculum Density vs Tuition (Coursera vs Udemy vs Skillshare 2026)
Curriculum-density audit of 50 courses across 7 major learning platforms. Hours-per-dollar variance up to 14x between Udemy (sale pricing) and Coursera Specializations. Cross-references BLS Occupational Outlook, IPEDS, Class Central, Coursera SEC filings, and Reich & Ruiperez-Valiente 2019 MOOC research.