Table 2.

Testing the range of values for parameters $\mathit{\alpha }$ and $\mathit{\beta }$ in different scenarios

Scenario	Parameters	Interpretation
I	$\mathit{\alpha }=0.25$ and $\mathit{\beta }=0.75$	Higher contribution of treatment, constant returns to scale
II (baseline)	$\mathit{\alpha }=$ $\mathit{\beta }=0.5$	Equal contributions, constant returns to scale
III	$\mathit{\alpha }=0.75$ and $\mathit{\beta }=0.25$	Higher contribution of prevention, constant returns to scale
IV	$\mathit{\alpha }=$ $\mathit{\beta }=0.45$	Equal contributions, decreasing returns to scale
V	$\mathit{\alpha }=$ $\mathit{\beta }=0.55$	Equal contributions, increasing returns to scale
VI	$\mathit{\alpha }=0.55$ and $\mathit{\beta }=0.5$	Higher contribution of prevention, increasing returns to scale

$\mathit{\alpha }$ and $\mathit{\beta }$ the relative contribution parameters of prevention and treatment, respectively