On Dictatorship, Economic Development and Stability



saddle.

If q


1         2 -1

1σ

2-α (1 -1 ) 2 (1 -1 )


, then 1-σ [1 — q(2 a + α)] > 1 and, therefore, trJ| <


11 + DetJ|. If DetJ| > 1, the steady state is unstable. If DetJ| < 1, the steady

state is a sink.

When σ < 1, there are two cases:

If σ < 2 ,it can be shown that 0 ^-^ [1 — qr(2 a + α )] < 1 and, therefore,
[trJ| < 11 + DetJ|.If ]DetJ| > 1, the steady state is unstable. If ]DetJ| < 1, the
steady state is a sink.

If 1 > σ > 2, there are two subcases depending on ρ:

, „             2-1         ,          _ r .                            ,       .        , ,       „        ,     ,,      , .      _ ,,

a/ If q < -—, σ 1., then τσ~ [1 — q(2 — α + α)] > 1 and, therefore, [trJ| > 11 + DetJ|.

'             2—α (1 — σ )           1σl- v^            σ',j                                 1      11               1

The steady state is a saddle.

2_ 1

b/ If q > -—, σ 1., then τσ~ [1 q(2a + α)] < 1 and, therefore, [trJ| < 11 + DetJ|.

'               2α (1 σ )             1σl-                         σ',j

If ]DetJ| > 1, the steady state is unstable. If ]DetJ| < 1, the steady state is a sink.

46



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