Facebook's (FB) Q1 global ARPU was $1.15, -11% Q/Q (seasonality) and +15% Y/Y, the company discloses in its earnings slides. ARPU fell less Q/Q overseas than in North America (-14%), with Asia down less than 2%, a sign of progress for international monetization. But even after adjusting for income levels, much work still needs to be done: North America ARPU was $2.85, Europe $1.38, Asia $0.57, and other markets $0.48. Also: mobile-only monthly active users (MAUs) rose 20% Q/Q and 128% Y/Y to 189M, making up 17% of total MAUs. FB +0.3% AH, as investors balance surging mobile ad sales with PC weakness.