Canada ranks seventh in the world for ease of doing business, according to the World Bank's 'Doing Business 2008' study, recently released.
We're particularly poor at enforcing contracts (43rd), which meshes with what I've picked up in the patent/growth literature on Canada's relatively poor protection of intellectual property.
Trading across borders is another stumbling block (39th), which I suspect might have been even worse if they looked at the interprovincial barriers to trade. For example, Newfoundland is currently planning to spend unnecessary billions building an undersea transmission line to the US for hydro electric power because Quebec is a roadblock east.
I have yet to hear any reasonable justification for any interprovincial barriers to trade. Maybe we'll see more movement towards TILMA and related initiatives. I hope.