Business Cycle Dynamics of a New Keynesian Overlapping Generations Model with Progressive Income Taxation



The log-linearized budget equations for generation s = T + TR are:


cτ+τ R ,j ^ T+τ Rj (1 — τ0 ) yτ+τ R ,j yτ+τ Rj — trtrt ΩΩ t


= (1 - δ) kτ+τRj ^T+τRj + mτ+τRj mτ+τRj


( τ 0yτ+τ Rj + pens + mτ+τ Rj ) π t,


j = 1, . . . , ne.


(30)


From the factor market equilibrium conditions (15) and (16) we obtain:


w t + αNt = αKt + g t + Zt,


rt + (α 1)Nt — (α 1)Ki't + gt + zt.


(31)


From aggregate profits Ωt = (1 — gt)ZtNt αKα, we derive


(1 — α ) Nt = αKt + (1 — ь ) g t + Zt.


(32)


The aggregate consistency conditions (23c), (23b), and (23d), imply


ne τ+τR

KK = X X

j =1 s=2
ne τ
NN = XX

j =1 s=1

μ(j) ks,ksj
t + t R k kt ,

μ( j) ns,j^ sj
n b ,
T
+ TR t ,


ne τ+τR

Σ μ μ(j) sjjsjj

(33)


T-+ T + T Rm j m t

j =1 s=2

Finally, the log-linearized budget constraint of the government (21) is given by:

ne τ+τR

X X T+T R τ 0ys,j y s, trtrt = (1 θ ) m7m t
j
=1 s=1

ne T+T R μ ( j )                                      T R

ʌ
θm θ t,


Σ τ , τRτ0ys,j + (θ 1)m + (m m) TMTRpens πt

T + TR                     T + TR

j=1 s=1

(34)

where m = m — P= 1 (μ(j)/(T + TR))m1 ,j.

Next we derive the set of equations (26b). We begin with the log-linearized budget
equations of generation
s = 1. From (5) we derive:

k 2,jμ 2+1 + θm 2 j m 2+1 + ( τ 0y1 ,j + m1 ,j ) t = (1 — τ0 ) y1 ,j ∙y 1,j + trtrt + ΩΩ t — c1 ,j c t1 ,j,
j
= 1, . . . , ne.

29



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