The analysis is typically a cost analysis, which is what I have been mandated by Parliament to do. I'm estimating the cost of proposals. If further analysis is deemed feasible and required, I'm sure there are lots of think tanks out there that are more than happy to do the cost-benefit analysis, and if the government itself has a cost-benefit analysis, I'm sure it would be more than happy to disclose that.
To my knowledge, there hasn't been that much work undertaken on the cost-benefit analysis, because it's a complicated field that requires lots of data spanning several years. That's why even though it would be ideal to have the cost-benefit analysis, the benefits are always not very tangible and not easily measurable.