Five things to watch for in the Canadian business world in the coming week: Tariffs Businesses and investors will be watching for the latest developments in Canada’s trade dispute with the U.S. and the possibility of crippling tariffs being imposed starting next month. Efforts by Canadian politicians to lobby U.S. President Donald Trump to back off on his threats, which would raise prices and hurt both Canada and the U.S., are expected to continue this week. Real estate data Two key data points for the Canadian housing market are expected this week. Canada Mortgage and Housing Corp. is scheduled to release January housing starts figures on Monday. Meanwhile, the Canadian Real Estate Association is expected to release home sales figures for January on Tuesday. Home sales in December were up…