The best stories across the web on media and technology, curated by Lily Leung

1. The world’s most succecssful media companies (PaidContent)

2. India’s largest news network accuses Nielsen of manipulating ratings data (Hollywood Reporter)

3. Jonah Lehrer resigns from the New Yorker, e-book pulled off shelves (PaidContent)

4. Twitter makes stock symbol $ ‘cashtag’ official (The Verge)

5. Report: Safety risks faced by mobile users in repressive nations ‘beyond levels realized’ (Freedom House)