Semiconductor chips are part of the technology we use every day — electric toothbrushes, mobile phones, computers. And there are hundreds, if not thousands, of them in new vehicles. But since the COVID-19 pandemic began, chips have been in short supply, causing, for example, some automakers to pause production lines. Some big tech firms predict the shortage will last into next year and perhaps beyond. Marketplace’s Kimberly Adams speaks with Chris Miller, author of the new book “Chip War: The Fight for the World’s Most Critical Technology.” He explains why this shortage happened.