It`s Wednesday afternoon at this mall in Garden City, New York and you could play catch in the parking lot. A slow shopping center is hardly conclusive evidence of a weak economy, but some experts say it`s no surprise given other signs of lackluster activity. The housing market remains in the cellar. Sales are down at the nation`s go-to store. And, job growth is still far too slow to put millions of Americans back to work. Economist Ed Yardeni also points to the recent increase in weekly jobless claims and weakness in the auto sector because of parts shortages in Japan.