An independent investigation into how the Guggenheim Museum handled last year’s exhibition on the artist Jean-Michel Basquiat has concluded there is no evidence that the show’s guest curator, Chaédria LaBouvier, who is Black, “was subject to adverse treatment on the basis of her race,” the museum announced on Thursday. The museum simultaneously announced that Nancy Spector, the artistic director and chief curator, who is white, was leaving “to pursue other curatorial endeavors and to finish her doctoral dissertation.” She has spent 34 years at the Guggenheim and has been publicly criticized by Ms. LaBouvier. – The New York Times