David Rosenberg: Canada was once productive and competitive, but not today

• Canada's economy grew 0.6% in January, faster than expected • Four Ontario school boards sue social media companies over impacts on learning and mental health • Russia alleges Ukrainian nationalist link to concert attack; US dismisses as baseless • Kitchen sponge maker Scrub Daddy explores potential sale with valuation of hundreds of millions • Canada introduces tougher reviews of foreign investments for national and economic security