Here are some unemployment rates from around the world. Canada 7.1%, UK 5.6%, US 5.4%, Japan 3.3%, Korea 3.8%, Germany 4.7%, Norway 4.3%, Mexico 4.4%, Australia 6.1%, New Zealand 5.9%, G7 total is 5.9%--this is the most important one, if Harper's claims are true, why is the G7 total so much better than ours? Numbers are harmonized, before the Harperistas here start whining...
Interesting enough all these countries have corporate tax rates basically equal to ours (some maybe 1% lower) and higher. In the higher category: Germany, Norway, Japan, Australia, New Zealand... None of these are race to the bottom, they have higher corporate taxes and good paying jobs. Add to this China, Mexico, USA and many others that our jobs are going to also have dramatically higher corp tax rates than we do.
Then there are also some western counties like Ireland that have less than half our corp tax rate yet 9.5% unemployment...
Plotting all the western democracy data I can find, the trend is lower unemployment in jurisdictions with higher corp taxes. There are some exceptions like France of course, but they are very few and far between (and we know the issues there have nothing to do with taxes).