The Globe and Mail reports in its Friday, March 22, edition that Ottawa is currently revamping its temporary immigration programs. The Globe's Jason Kirby writes in the Decoder column that according to a recent analysis conducted by the Bank of Nova Scotia, the massive decline in productivity over the past two years can be attributed to two main factors: chronically low business investment in Canada and the sudden population surge. The latter factor alone is responsible for two thirds of the decline, as the population grew by 1.25 million last year. Given weak investment levels, that is far more than the 350,000 permanent and temporary immigrants Canada's economy can absorb without having a negative impact on productivity, according to Scotiabank's Rebekah Young. She says, "There is a sweet spot when it comes to economic immigration -- where everyone is better off over time -- but it is narrow and Canada has strayed far off course." She adds that the surge of temporary workers has helped keep a lid on what would have been even higher wage increases, giving businesses even less of a reason to invest in productivity-boosting measures. Ms. Young says, "Canada's immigration policy needs a reset, not quick-fixes."