On Dictatorship, Economic Development and Stability



Using the expression of Υ, the determinant becomes:

DetJ


τ⅛(1 q)1 σ+1+a [(1 + ρ )β (1 α )l ] 1 -σ


( αq)1-σ


(1 -q)2 A [ (1 -a )]α


(1+β )α


— l (1 [)a)


_-_ (1 [) AA+1+a ( ɪ ) -

α-101⅛ l (1 [a (--q)2 A[(1 -a)]α
α q 1(1    q) l (1+ β) αl (1 -q)α

-1


Simplifying and replacing (1 — q)a by its steady state expression yields

DetJ = -


αq


(1 [)


(1 -q)2 Aa-α [(1 -a)]α [β(1+ ρ)(1 -a)l+a]α


l (1+β )α


-1


Replacing (1 — q) by its steady state expression, the large term in the denominator can

be identified as (1 — q)/(1 — τ). Finally, after simplification, we obtain:

DetJ =


-αq[


(44)


Condition 1: if q ] 1 +a , ^[, then DetJ| > 1;

Condition 2: if q ] 1ι, 1[, then DetJ| < 1;

where q is a function of the parameters ρ and l ; τ is a function of the parameters l, ρ and

A (see equation (29)); and 0 < τ,q < 1.

As for the trace, rearranging (42) yields
where 1
— τ = a(1 -l-)^α (see equation (36)).

trJ = Ω + J


_ μ        α        ∖ a (1 — q)- + a[a

σ y(1 + ρ ) β (1 — α ) l + α J                 


1+a (1 - σ )     (1 - ∙


(1 + ρ ) - Υ


τ)(σ+a(1 )) ´
aσ I


The second additive term of the trace can be simplified in the same way as the determinant.

After some computations, we obtain:

44



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