As data from the last 150 years show, a market that thrives on free trade will have to diversify to survive

Sales of art collections may be forced on English local authorities that are technically bankrupt following cuts in grants from central government

When prices rise, investors often buy art to lower risk and increase returns. But the market's buoyancy may be short-lived, as experience tells us

Demographic change is probably the most important factor in shaping the market's future, wrote this expert in 2011