X = Academic Rating • Y = PhD Productivity • Bubble size = Earnings & ROI (two-tier) • Hover/tap to explore
Source: ¹ú²úµÚÒ»¸£ÀûÓ°Ôº²Ý²Ý, 2026 | Two-tier C4 | Top 100 of 518 programs | Labeled: top 20