The US economy showed continued signs of recovery early this year, with retailers posting their best monthly sales performance since before the recession began in 2007. The 3.7 percent gain, which beat analystsÔÇÖ expectations, showed that shoppers are starting to spend more, with many willing to pay for certain higher-end goods. The February sales report was the third consecutive monthly increase, according to the International Council of Shopping Centers (ICSC). The trade group, which analyzes data from 29 chain stores, was expecting only a two percent increase.