is Head of Art Business Studies at Sotheby's Institute of Art and author of numerous books on the art market. His most recent books are, Understanding Art Markets: Inside the World of Arts and Business, (2016) and New Art New Markets, (2018). He lives and works in London.

is Head of Art Business Studies at Sotheby's Institute of Art and author of numerous books on the art market. His most recent books are, Understanding Art Markets: Inside the World of Arts and Business, (2016) and New Art New Markets, (2018). He lives and works in London.