Mixed Reviews for Weekend Shopping 20-Dec-04 ----------------------------------------------------------------- The final weekend before Christmas generated mixed reviews from those who measure sales activity. According to Michael P. Niemira, chief economist at the International Council of Shopping Centers and an adviser for ShopperTrak, the weekend was a bit of a disappointment with traffic and sales below expectations. Total sales were down 7% to $6.7 billion on Saturday, according to Shoppertrak, which estimates sales results at 30,000 outlets.