“Sales in London last week generated a fresh round of head-spinning prices: a Freud for £11.8m and a Jeff Koons sculpture for £13m. By comparison, the South African-born artist Marlene Dumas became the most expensive living woman artist at auction on Tuesday when her work The Visitor sold for £3.2m at Sotheby’s. It’s a constant source of disappointment to see the discrepancy in prices between outstanding female artists and their male counterparts.”