The new campaign coincides with the launch of Well Written and Red, a book about the campaign, written by the veteran copywriter Alfredo Marcantonio.
Ten new posters, by Abbott Mead Vickers BBDO, inform readers that they can stay one step ahead by reading The Economist.
The new work, which breaks today, is designed to capitalise on the world's current state of economic and political uncertainty.
"Morse code" bears the words "The essence" in Morse code. A second ad conveys the excitement of reading The Economist each week, with the line: "Get fired every Friday."
A number of people were responsible for the creative in the campaign, with Ron Brown creating "Morse code" and Brian McHale behind "Get fired every Friday".
Jacqui Kean, the brand marketing manager at The Economist, said: "Readers engage with the campaign and enjoy the intellectual challenge that it presents."
Media planning is by PHD, with buying through Outdoor Connection.