German artist questions authorship and market value in show of paintings by Chinese copyists based on famous works by Caravaggio, Hockney and others

Christie’s and Sotheby’s dominate in terms of value but smaller firms can compete in the field of Asian art, with the internet’s help

Our pick of highlights from upcoming auctions

Our pick of this month’s most interesting auction

Buyer bidding through advisors Gurr Johns, combined with strong Asian interest, buoys London Impressionist and Modern art sales at Christie's and Sotheby's

Christie's sale of 46 works from La Salle collection will diminish the museum and its academic programme

Mousquetaire et nu assis is among highlights of London evening sale of Modern and Impressionist art in February

London and New York antiques dealership will now form new private sales division of UK auctioneer Dreweatts, based in Berkshire and Pall Mall

The company uses image recognition software to find works of art that match users’ tastes

The auction house has merged with Swiss technology company The Native

Contemporary art leads market recovery at Christie’s, Sotheby’s and Phillips, according to ArtTactic report

$450m Salvator Mundi sale too late to be included in new book, The Orange Balloon Dog, but would have filled several chapters, economist says

Set of 12 ink panels by traditional master sell to Chinese buyer at Poly Auction Beijing for RMB931.5m

Works by George Grant Elmslie, Umberto Bellotto and Jean Royère

AucArt offers platform upon which its pick of British art-school graduates can sell directly to buyers

Buyers using works as collateral and allegedly defaulting on payment becoming increasingly common in "frothy market"

Major auction houses and galleries have been caught up in the fake art scam