Global business review from the Economist

In an unexpected move, Sergey Brin and Larry Page stepped down from their respective roles as president and chief executive of Alphabet, Google's parent company. The pair founded the internet giant in a garage while at Stanford in 1998. They will retain their combined voting majority in the company and continue to sit on the board. Sundar Pichai becomes Alphabet's chief executive in addition to his job running Google, expanding his brief to oversee "moonshot" projects, such as driverless cars and electricity-generating kites. Brin and Page assured Pichai they would still be around to offer "advice and love, but not daily nagging."

Stock markets had an unsettled week amid uncertainty about the United States and China reaching a trade deal before Dec. 15, when tariffs are due to rise on a raft of Chinese goods. President Donald Trump's ruminations about being prepared to wait until after November's presidential election to reach an agreement spooked investors at first, but was then dismissed as a negotiating tactic.

Trump said he wanted to raise tariffs on metal imports from Brazil and Argentina, accusing both countries of manipulating their currencies. The president also threatened to impose 100% tariffs on $2.4 billion-worth of French goods, including champagne, after the United States Trade Representative found that France's digital tax discriminates against U.S. companies such as Amazon, Facebook and Google, and is "inconsistent with prevailing tax principles."

The World Trade Organization rejected the European Union's claim that it no longer provides illegal state aid to Airbus, a second victory in recent months for Boeing in the pair's 15-year dispute. In response, the U.S. Trade Representative said it would look to increase the retaliatory tariffs it imposed in October on a range of European goods following the WTO's first ruling.

In contrast with souring trade relations elsewhere, Japan's Diet approved a trade deal with the U.S. that slashes tariffs on American beef and pork imports in return for lower levies on Japanese industrial goods.

Brazil's GDP was 1.2% higher in the third quarter than in the same three months last year.

Also pulling out of the doldrums, Turkey's economy expanded by 0.9% in the third quarter, following nine months of contraction.

More consolidation beckoned in the luxury-goods industry as Kering, a French group that includes the Gucci and Saint Laurent brands, was said to be interested in buying Moncler, an Italian skiwear-maker. Just last month, LVMH reached a deal to buy Tiffany's, the U.S. jewelry retailer.

The political leaders of NATO countries gathered in London for a meeting. President Donald Trump sparred with both Emmanuel Macron, the president of France, who recently described the military alliance as being in a state of "brain-death," and with Justin Trudeau, Canada's prime minister, who was caught on camera mocking the U.S. president. Despite these mini-rows, NATO, at 70 years old, is in better shape than it sometimes looks.

Germany expelled two Russian diplomats in retaliation for the killing of a Chechen separatist in Berlin in August. The government has been slow to act over the case.

Finland's prime minister, Antti Rinne, resigned after a key political ally withdrew support. He had been in office for just six months.

A military court in Suriname convicted the country's president, Desi Bouterse, of murder and sentenced him to 20 years in prison. In 1982 soldiers killed 15 opponents of the regime then led by Bouterse. He will not begin his sentence until a decision is made on his appeal. He may be re-elected next year.

Human rights groups said as many as 450 Iranians were killed during protests over a rise in the state-controlled price of fuel last month. The regime was accused of trying to hide the scale of its crackdown by shutting down the internet.