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



through the CB reaction function (equation (28)). The higher is the degree of CBC, the
more severe are the employment consequences of wage aggressiveness27. Drawing on Lippi
(2003) terminology we refer to it as
adverse output effect.

On the other hand, since a conservative CB leads unions to perceive less the inflationary
impact of their wage, they also anticipate the real wage of other unions to decrease to a
lesser extent and, hence, the shift of labor demand towards cheaper labor types is smaller28.
This
adverse competition effect encourages wage aggressiveness (Lippi, 2003).

Now it may be interesting analyzing the two limit cases of a CB ultra-populist and
ultra-conservative. Letting the CBC go to zero, i.e. assuming that the CB does not care
about inflation but only about agents’ utility, we obtain the monopolistic competition level
of employment29

" = £ (1 - ɪ) .                           (42)

When the CB is ultra-populist the strategic interaction channel between trade unions and
CB is halted30. In such a case, the employment level is below the Pareto efficient one,
^,
and it depends on the degree of substitutability among labor types. As specified in section
5, an ultra-populist CB accommodates any domestic wage hike one-to-one which implies
that wage setters can not affect employment.

The other extreme case of a CB that cares only about inflation, i.e. an ultra-conservative
CB, yields the following equilibrium employment level under a NMP and a MU regime

respectively

a /

Iim I = — I 1


β→∞


1

+βFθF


nH k0N +βpΘf (1-o)


+ (1 - nH) '


Iim I = α


β→∞


ɪɪ + (1 — ɪ U
пн 1-a   у    пн J


(43)

(44)


From the relation (42), (43) and (44), we can make the following remark.

27Formally this can be seen by differentiating the first term of equation (41) with respect to CBC:


d ( n
k


sn
1-«n


β^N sN


/      d3N

β + ⅛)


where Θf = 1 α(l 7)

k(1 oQ(nH 7)7     Q

[nH (1 αβ2β + k(nH 7)]2


____________________k(nH -1Xk+βFkF )2^N___________________

[k(nH 1Xk+βF kF )+nH ββF ®N ®F (®F 1)+nH β^F ®F Xβ]

and Pf is the degree of the Foreign CBC. In a MU, βpuΓ^ 1-'s,


28Formally this can be seen by differentiating the second term of equation (41) with respect to CBC:


d I nH 1 σ J
nH 1 Sn 7


dsN

nH 1  σ__

n H 1 s n 1 s n


Q and in a MU -⅛ (    ' 1-2-ʌ) =

nH 1-su J


=__kn2H (k+βF Θ^F )2Θf [kθ hF dF (1 a)]α________________

(nH 1) [k(nH 1Xk+βF ®F )+nHββF ®N Θf (9f 1)+nH β(k+βF ®F Xβ√ P

_________knH (1 Qβ27g-_________ Q

(nH 1)[nH (1 αβ2β+k(nH 7)]2


29The values of ηr in the case of an ultra-populist and ultra-conservative CB are derived in the Appendix.

30The CB has only one target (employment) and hence the trade-off between inflation and employment
in its optimal monetary policy is prevented. An increase in nominal wage will cause an equal increase in
money supply. This implies that labor unions can not affect their real wages.

16



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