Rengan Rajaratnam wore jeans and a dark suit coat to his initial court appearance, where he only said "not guilty, your honor" when he was asked how he would plead to the charges.

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It does have very slight pinstripes, which are currently consuming my ability to breathe, for I'm not sure if it technically counts as a blazer, a sports coat or a suit jacket.

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Singular among the clothes in the show is a superbly cut black wool coat and trouser suit of 1928, made for Michael Strange, which was the pseudonym of Blanche Oelrichs, a poet who was once married to the actor John Barrymore.

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Not a sports coat but a buttoned suit with a starched white shirt and a pinned tie meant something to her.

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According to Christopher Breward of the Victoria and Albert Museum the tailed morning coat finally gave up to the lounge suit with the rise of American business culture at the end of the 19th century.

ECONOMIST: Men's clothing

And a study carried out in Scotland in the early 1990s found male GPs wearing a suit and tie and female doctors wearing a white coat who were most favoured, especially among older and richer patients.

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If the plane is large enough, there may be a coat rack in First Class, intended for garment bags and suit jackets.

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The single or double vents that make it comfortable to wear a coat on horseback are testament to the sporting antecedents of the suit.

ECONOMIST: Men's clothing

The suit's W-collar seems to have developed from turning down the stand-up collar of a frock coat, which in turn derived from army and naval wear.

ECONOMIST: Men's clothing