As my defence economics colleague Ugurhan Berkok would likely tell you, there's no methodology to actually measure these particular benefits that is broadly accepted by defence economists. The benefits are whatever we say they are.
I would say that the investment in the benefits should primarily be in building capacity for Canada to become...and to maintain a high-tech defence technology capability, rather than how many jobs we might be able to provide in any one particular riding. That is ultimately the sustainable component—seeing ITBs as an investment in sustainability for Canadian industry more broadly, rather than benefits that might accrue to any one riding.