Strategic monetary policy in a monetary union with non-atomistic wage setters



The goods-market-clearing condition implies that total output demands equal supplies,

7 [7PC + (1 - 7)PC,] = PhYh                     (8)

(1 - 7) [7P5 +(1 - 7)PC*] = PfYf                    (9)

where Yhʃɪ Yh(z)dz and Yfʃɪ Yf(z)dz. From equation (8) and (9) we can derive
the following expression:

Ph Y h = Pf Yf                        (IO)

where Yh ɪ ʃɪ Yh(z~)dz and Yf ɪɪr ʃɪ Yf(z~)dz. Relation (IO), together with the
assumption that agents do not hold international assets, implies that current accounts
always are zero (Obstfeld and Rogoff, 1998) and that

Cw = C = C *.6

(11)


Let Mhʃj Mjdj and Mp ʃɪ Mjdj be the total money supply in the Home and
Foreign country, respectively. We assume that total money supply in the monetary union
is distributed across the two regions according to the country size as follows

Mu = m ɔʃ m ɪ^.
h
Hr

(12)


Normalizing the previous period nominal money supply, the current nominal money sup-
plies can be expressed as

Mu = 1 + mu

where mulog Mu stands for percentage increases.

Finally, using equation (11), (8) and the cash in advance hypothesis, the aggregate-
nominal demand (7) in the domestic country can be rewritten as

Ph Yh


[1 Ph (z)Yh (z)dz = Mh .
Jo


(13)


Likewise in the Foreign country the aggregate nominal demand is proportional to money

supply


PfYfɪ Pf(z)Yf(z)dz = Mf.

(14)


Jo

6This can be easily proved by using the relation (1O) into the individual budget constraint as follows:



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