We explore the incentives for governments to cooperate by expanding ex
penditure. We have three countries: two are in a monetary union (the E
MU). The labour markets of both the EMU countries are unionised, and t
here is involuntary unemployment in equilibrium. We explore the intra
and intercountry effects of changes in bargaining power. We then exami
ne optimal government expenditures in each EMU country; we find that t
here is a positive spillover, and that expenditures are strategic comp
lements. The coordinated equilibrium involves higher expenditure than
the uncoordinated equilibrium.