Wicked (musical) | Wicked | Wicked Witch of the West | ''Wicked'' | The Weak and the Wicked | Wicked Wicked Games | Wicked Game | Wicked Attraction | 99 Problems | Wicked Science | The Crow: Wicked Prayer | Hilbert's problems | Fox Kids' Wicked | Xbox 360 technical problems | Wicked Wonderland | Wicked Wisdom | Wicked Willie | Wicked, Wicked | Wicked Pixel Cinema | Wicked Little High | Visionaries: Small Solutions to Enormously Large Problems | ...Upon My Wicked Son | Unsolved Problems in Number Theory | The Wicked | The Kingdom of the Wicked | Something Wicked Saga | Problems of Peace and Socialism | Other People's Problems | ''Man's Best Friend'', the 1984 book introducing Gray Jolliffe's character Wicked Willie | Jewish race as a scapegoat for Germany's worst problems |
He specializes in decision making in complex and turbulent environments (Wicked problems, Futures Studies, Complexity theory).