Half of teen spending is concentrated in 3 categories, reports Piper Jaffray in its latest “Taking Stock With Teens” survey. Clothing (21%) and food (20%) occupy the largest portions of the teen wallet, followed by accessories/personal care (10%), car (9%) and shoes (9%). Looking back over the past decade, the survey notes that clothing’s wallet share has dropped, while food and electronics have grown. Parents contributed roughly two-thirds of teen spending, per the latest report. Read the rest at MarketingCharts.