New York—Looks like Junior’s allowance is helping out the economy. According to a study released yesterday by research firm MarketResearch.com and marketing firm Funderstanding.com, children ages 4–12 are responsible for spending $107 billion a year in the U.S. The study, which also looks at the spending patterns of the 27 million children in the U.S. ages 8–14, finds that today’s kids have more money to spend and start spending it earlier than previous generations.