Retail sales in the United States grew 3.7% in February 2017 compared to the same period last year, higher than the forecasted 2.7% growth. While the increase was the smallest in six months, January's core retail sales were revised upward to a 1.2% gain. Most retailers reported weak February sales despite warm weather, likely due to delayed tax refunds reducing household spending. More states are targeting online retailers to collect sales tax in efforts to offset lost revenue from e-commerce sales.