Which architect's design of the Guggenheim Museum Bilbao created the term 'Bilbao Effect' that describes how iconic architecture can transform a city's economy and tourism?

The architecture industry has seen numerous groundbreaking designs that transformed not just skylines but entire cities' economies and identities. One such phenomenon is known as the 'Bilbao Effect' or 'Guggenheim Effect' - where a single iconic architectural project can revitalize a city's economy and global standing. Test your knowledge about this famous case of architectural product innovation that changed how cities view landmark buildings as economic catalysts.

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Frank Gehry
Zaha Hadid
Rem Koolhaas
Santiago Calatrava