PREVIEW: Some of the major business and economic events scheduled for this week

The Canadian Auto Workers union threatened a strike at DaimlerChrysler at midnight Tuesday unless Canada’s largest auto-parts supplier, Magna International Inc., recognizes the union at an Ontario plant. The CAW said most of the 550 workers at Magna’s Integram-Windsor seating plant near Windsor, which makes seats for DaimlerChrysler minivans, have signed membership cards. It wants Magna to recognize the union on the basis of those cards, rather than insisting on a secret-ballot election, before which many companies run tough anti-union campaigns. Magna, with about 30,000 workers in the U.S. and Canada, has only a handful of unionized plants.