Recent economic indicators show there is reason to be optimistic the retail sector is reviving, says Jim Sullivan, managing director of Green Street Advisors who cites the $6 trillion added to the stock market during the past year and stabilizing unemployment rate. In the intermediate term, though, retailers -- and the landlords that rent to them -- will have to be cautious and prepare for tepid growth at best. Few believe the economy is headed for a strong, robust recovery. Also, rising tax levels are a near certainty. For these and other related factors, "landlords will have a difficult time commanding higher rents."