Consumers sharply curtailed their spending in January, indicating a potential weakening in economic growth ahead, according to a Commerce Department report Friday. Retail sales slipped 0.9% for the month from an upwardly revised 0.7% gain in December, even worse than the Dow Jones estimate for a 0.2% decline. The sales totals are adjusted for seasonality but not inflation for a month, in which prices rose 0.5%. Excluding autos, prices fell 0.4%, also well off the consensus forecast for a 0.3% increase. A “control” measure that strips out several nonessential categories and figures directly into calculations for gross domestic product fell 0.8% after an upwardly revised increase of 0.8%. With consumer spending making up about two-thirds of all economic activity in the U.S., the sales numbers indicate a potential weakening in growth for the first quarter. Receipts at sporting goods, music and book stores tumbled 4.6% on the month, while online outlets…
