Is the Rat War Over? In New York, a rat czar and new methods have brought down complaints. We may even be ready to appreciate the creatures. Rats were leaving Manhattan, hurrying across the bridges in single-file lines. Some went to Westchester, some to Brooklyn. It was the pandemic, and the rats, which had been living off the nourishing trash of New York's densest borough for generations, were as panicked about the closure of restaurants as we were. People were eating three meals a day at home, and the rats were hungry. At least that was the story going around.

"PlayerUnknown's Battlegrounds," the video game spawning a new genre of battle royale games such as "Fortnite," is finally arriving on Sony's PlayStation 4. The PUBG Corporation said its game will arrive Dec. 7, with multiple preorder bonuses specific to Sony's platform. The standard version, which will include custom skins from the series "Uncharted" and a backpack from "The Last of Us," will sell for $29.99. Special editions starting at $59.99 will feature bonus currency, 20,000 battle points and a Winter Map Event Pass. Brian Corrigan, studio director for PUBG (pronounced "pub-gee"), said publisher PUBG Corporation had been working on a version of the game for PS4 since the beginning of the year. "We've wanted to do it forever," Corrigan said. "PUBG" took off in early 2017, helping to establish the video game genre battle royale, where 100 players compete until one is left standing.

Can artificial intelligence (AI) tell you which conferences to sponsor? Calculating an event's return on investment (ROI) has never been easy, according to a Demand Metric survey, only 17 to 28 percent of companies currently track it. Yet the same report indicates trade shows take up to one-fifth of the average respondee's annual marketing budget. From booth design to sponsorship to travel, trade shows are not cheap affairs. AI can't eliminate trade show costs, but it may help optimize them.