Shoppers kicked off the season of buying with a strong Black Friday weekend, a signal that the economy's critical retail sector is gaining momentum.
Consumers spent 13 percent more over the weekend than in 2011, the National Retail Federation said. More people shopped, more people shopped earlier in the week, and more people said they would shop online on "Cyber Monday."
Roughly 139 million Americans spent $59 billion in stores and online from Thursday to Sunday, the retail group estimated. Another 129 million were expected to buy stuff online on Monday.
In an economy roughly 70 percent driven by consumer spending, the holiday shopping season has come to be perceived as crucial.
Economists are mixed on how useful Thanksgiving weekend is in predicting spending over the following month. But for retailers, concepts like Black Friday and Cyber Monday take on outsized importance. They offer one way -- however imperfect -- to assess consumers' willingness to buy as the holidays approach.
The long lines that started forming Thursday night and sent swarms of shoppers into the aisles through the weekend signal that consumers have gained confidence as the economy recovers from the recession, said Lorman Lundsten, a business professor at the University of St. Thomas.
"We find people to be quite optimistic, and I consider that to be a barometer for people expecting this recession to be over with," he said. "The holiday season is a stimulus for spending, and it seems that this year it's going to be quite useful."
Not everyone is persuaded of Black Friday's importance, however.