In April, Payless Inc. introduced it might shut 400 of its shoe stores as a part of its bankruptcy plan–on top of a separate four hundred it had already scheduled to shut. The mall staple RadioShack has filed for Chapter 11 twice in two years. So far this year, nine national retail chains have filed for chapter. In early May, management gave the remaining tenants 60 to ninety days to shut up shop. Get Exclusive Offers Via Our Newsletter Some of the nice mall die-off is what economists check with as a market correction. “We are over-retailed,” says Ronald Friedman, a associate at Marcum LLP, which researches client developments. There…