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Cost-benefit modeling difficulties
Linear models are not a true representations
of the process. We would like to see a
quadratic or polynomial models
Government subsidy formulas are complex
and mutable
Remuneration data is skewed in many ways as
it depends on many factors (experience,
personal traits, self-reporting)
There is little evidence of the intervention
effectiveness
The scientific knowledge often comes from
countries that is difficult to compare to South
Africa