38In estimating these parameter values, we approximate the uniform distribution by seven points (`β - 3∇ ∕3.5  , `β - 2∇ ∕3.5  , `β - ∇ ∕3.5  , `β  , β`+ ∇∕3.5  , `β + 2∇∕3.5  , `β + 3∇ ∕3.5  ). Increasing the number of points further does not notably change the results below.