On Dictatorship, Economic Development and Stability



σ -αq 1 1+a (1 )

1—σ — q+τ I ασ

(1 -τ)( σ+a (1 -σ ))


)’


and after simplifications, the second term of the trace becomes

—q

—ql τ


(τ( σ+α-ασ )


+ 1)


As for the first additive term of the trace, Ω, it can be rewritten as follows:


σ Λ _ l(1+β)α (1—q)α-2
1—σ y1      A[(1—a)]α


1     l (1+β )α (1—q)α-2

1       A [ (1—a )] α


(45)


The big term that is common to the nominator and the denominator can be identified,


by replacing 1 q by its steady state expression, as (1 τ)/(1 q).


After simplifications, Ω becomes:


[ τ(1 <)] + α<


q + τ


As a result, we obtain the final expression for the trace J:


trJ =


[1 q(2 α + a )1 <7(1 α )

q + τ


(46)


The final part of this proof consists in comparing trJ and 1 + DetJ, i.e.,


ισ [1—q(2—a+α )] 9(1—a)


—q+τ


I and I                 I.

l l —q1


This depends on σ, the magnitude of q, which itself depends on the value of the parameters
ρ and l, and on whether DetJ ^ 1 (conditions 1 and 2, established above).

When σ > 1, it can be shown that:

If q


2 1
______σ

2 (1σ )


, 1 , then either ɪ [1 q(2


α + a )1 < 0 or


■—:[1 <(2 α + a)1 > 1 and, therefore, trJ 11 + DetJ. The steady state is a

45



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