Economists seek to explain our world but they often get things wrong, argue two Nobel prize winners.
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Szu Ping Chan
Business reporter, BBC News
Global economy
Ivana Davidovic
Business reporter, BBC News
The global surveillance market continues to grow at a fast pace, led by Chinese technology.
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David Grossman
US correspondent, BBC Newsnight
The US-China rivalry is about more than trade - it spans economics, defence, culture and technology.
Read moreGiven a trade war, and South China Sea rivalries, how does the US see its relationship with China?
Economic pulse 'remains weak'
Will Hobbs, chief investment officer for Barclays Investment Solutions, has commented on today's market rally. He said:
The cyclical pulse for the world economy remains weak on the evidence of incoming economic data, however crucially it does not seem to be getting weaker. The slump in interest rates of all maturities seen this year should be among the factors helping the corporate sector to find its feet a little in coming months and quarters. A little more visibility on trade may also help.
The Saudi event includes some figures who stayed away in 2018 over the killing of Jamal Khashoggi.
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Tim Bowler
Business reporter, BBC News
High profile trade rows simply underline the value and importance to us all of global trade.
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The annual meeting of the IMF gets under way in Washington this week.
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Andrew Walker
BBC World Service economics correspondent
In its latest economic assessments, the IMF says risks to global financial stability remain high.
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The International Monetary Fund warns against "policy mistakes" such as tariffs and a no-deal Brexit.
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