Yelp ratings get better when they cost something—like time

An international team of researchers tested the idea that free online ratings are less trustworthy than those that have some cost to them, drawing from the ecological theory known as "costly signaling theory."

Game console makers oppose China tariffs

Game console makers Microsoft, Sony and Nintendo have joined forces in opposing expanded tariffs on China, saying the plan would make their products unaffordable for the coming holiday season.

5G: Five things to know

It is heralded as an essential step to a brave new world of technology, but in the here and now, super-fast 5G networking is already pitting China against the West.

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