We choose the following normalisation14 in order to simplify the wage equation and
the manufacturing price index:
β=—
σ
1
α = —
σ
(24)
From the pricing rule equation we get: pi = wi and ni = Li. It is possible to rewrite
the price index as:
P=[ L{w∖σ + L2 w' σφ ] '~σ
P =[Lw2σ> + L2w2l σ]1-
(25)
and the wage equation as
ɪ ɪ
W1 =(σ-1)μσ [Y1 P1σ-1 + Y2P2σ-1φ]σ
ɪ ɪ
w2 =(σ -1) μσ [Y1 P1σ-1φ + Y2P2σ-1 ]σ
(26)
where φ = T σ = 1∣τσ 1 (remember σ > 1). The parameter φ which is a function of the trade
costs can be interpreted as a parameter reflecting freeness of trade, ranging in between zero
for very high trade costs when τ →∞ (autarky), and one in the case of no trade costs, i.e.
τ = 1.
14 The scope of these normalisations, widely used in this literature, is to shift the analysis to the number of
manufacturing workers and their wages in each region in order to study the equilibria in the model and their
stability.
19
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