When General Electric bid for Honeywell in 2000, it was Jack Welch’s last “swing for the fences”. The GE chief executive handwrote the $43bn offer faxed to his Honeywell counterpart. He delayed his retirement to see through the takeover. He went alone in June 2001 to the last meeting in Brussels with Mario Monti, then European competition commissioner.

For students of perverse incentives created by tax, it is a bonanza week. Apple has raised $12bn in bonds to buy back shares, despite having $130bn sitting in cash overseas, and Pfizer wants to turn itself into a UK-domiciled company by acquiring AstraZeneca for £60bn.