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Evan and Sarah ask: What power do central banks have?
The Radio 4 presenters discuss the Trump and Jerome Powell row
It didn’t take President Trump long to back down from his threat of sacking the Federal Reserve boss Jerome Powell, having called him "a major loser".
But what is the role of the central banks and how much power do they have?
The World At One's Sarah Montague and PM's Evan Davis take a deep dive on this week's Figuring It Out.