Rio Tinto Alcan is encouraged so far by the strength of the global economic recovery but wants to wait a little longer to determine how stable the rebound is before ramping up its Canadian spending commitments. "We really want to see where demand is going to be over the next two or three quarters," Jacynthe Côté, chief executive officer of the aluminum division of London mining giant RioTinto PLC, said yesterday. Government stimulus programs around the world have helped boost demand and prices for aluminum but it's important to see whether the rebound holds up once the stimulus spending comes off, she said after making a presentation to the Montreal Board of Trade. Rio Tinto Alcan has about $6-billion of planned investments in Canada, including two smelters in Quebec and one in British Columbia.