1,1 T+TR,1 1,ne T+TR,ne 0
market income yt := [yt, , . . .yt , , . . . ,yt, , . . . ,yt , ]0,
• the rental rate of capital rt , the real wage wt , the aggregate capital stock Kt ,
effective aggregate labor input Nt , the beginning-of-period stock of real money
balances mt, aggregate transfers Trt, and aggregate profits Ωt. Thus, ut is a
vector of ne[2(T + TR) + T] + 7 elements.
We seek a representation of our model in the form
DxλEt
x t +1
ʌ
λt+1
+ Fxλ
xt
ʌ
λ t
Cu u t = Cχλ
x t |
+ Cz |
z t |
ʌ |
ʌ | |
λ t |
θ t |
DuEtu t+1 + Fuu t + Dz Et
zt +1
ʌ
θ t +1
+ Fz
zt
ʌ
θ t
(26a)
(26b)
where the hat denotes percentage deviations from the non-stochastic steady state value
of a variable.
We first derive the set of equations (26a). The log-linearized Euler equations (6) are20
ʌ ∙ ∙ i- ∙ -I
ʌtj = (γ(1 - σ) - 1) cs,j + (1 - γ)(1 - σ) £ms,j - πt] ,
s= 1,...,T+TR, j = 1,...,ne.,
m 1,j = 0 ∀j = 1,..., ne. (27)
The log-linearized Euler equations (9) are:
η1
nsj
-----:П
- ns,j
s,j
t
τ00
- τ0
y∙-j ^sj
- wt = λ∙stj
τ 0 + τ 00ysj
1 - τ0
π t,
s = 1,2,... ,T, j = 1,2,... ,ne, (28)
where τ0 and τ00 denote the first and second derivative of the tax function evaluated at
ys,j , respectively. The ne(T + TR) definitions of market income yield:
0 = У 1,jУt,j - we(1, j)n 1 ,jn1 ,j - we(1, j)n1 ,jw^t,
j = 1,...,ne,
rks,jkS,j = ys,jyS,j - we(s,j)ns,jns, - we(s,j)ns,jw^t - rks,jrt,
s = 2, . . . , T, j = 1, . . . , ne,
rks,jкS,j = ys,jyS,j - rks,j^t,
s=T+1,...,T+TR,
j = 1, . . . ,ne. (29)
20We will use the ne equations for generation T + TR later to eliminate ^T+T ,j, which is a control
rather than a costate variable.
28
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