Stakeholder Activism, Managerial Entrenchment, and the Congruence of Interests between Shareholders and Stakeholders



Appendix

Proof of lemma 3 Define xbr (π) as the level of environmental regulation such that (2) holds

as an equality:


xbr (π) =


θ(p + τ)] πa λτ∆θ(1 π(1 a))
(1
π)(1 λ)τ


(3)


Let ∆θ = θRθI. By inspection of (3), br (π) < 1 if and only if Γ < Γ1(π) ∆θ(p+τ(1+λ))+
(∆θτ(1
π)∕πα) and br(π) > 0 if and only if Γ > Γo(π) (p+τ)∆θ+(∆θλτ(1n(1a)))∕πa.
Notice that since λ
(0,1), Γo (π) < Γ1(π). ■


Proof of proposition 1 Let H1 = ∆θ(p+τ(1 λ)) and H2 = ∆θ(1 a)(p+τ(1 λ)) +aΓ
where ∆θ = θ
R θI. If managerial entrenchment is to be countered, shareholder value writes
as

Vsh(Xr(π)) = ( θI + nA* ) (Hi πH).
∆θ(1
π)

The first order condition for shareholder value maximization is given by

π2∆θH2 2π∆θH ɪH ΘrHi) _
∆θ(1 π)2              = 0'


Solving for π* we obtain


— *
π1,2


1±


Θr a(Γ ∆θ(p + τ (1 λ)))
∆θ(aΓ + ∆θ(1
a)(p + τ (1 λ)))


if Γ < ∆θ(p + τ(1 λ)), the discriminant is negative and VS0H (π) > 0, for all π (0, 1).

In this case shareholders always want to set π as close to 1 as possible. Conversely, if

Γ > ∆θ(p + τ(1 λ)), the optimal level of corporate governance quality is given by


π* = 1


Θr a(Γ ∆θ(p + τ (1 λ)))
∆θ(aΓ + ∆θ(1
a)(p + τ (1 λ)))


Notice that π* is decreasing both in a and Γ. ■


24




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