ATANHArgentine Tango Association of New Hampshire
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[[sigma].sub.rel](t) = A x atanh [tanh (B)exp (-t/[tau])] + [[sigma].sub.e] (3)
The estimation equation with Fisher's z as the criterion variable is: in(atanh |r|) = In(a) + b(ln N, from which scores for the value of social capital can be recovered; v = tanh[a[(N).sup.b], where atanh is the arc hyperbolic tangent, and tanh s the hyperbolic tangent.
The insignificant estimates for the error correlation term (labeled atanh [rho]) and for the test of independent equations suggest that selection is not affecting the second-stage results in the U.S.