Despite Christ's (1968) warnings, modem macroeconometric models for po
licy analysis still fail to treat the government budget constraint (GB
C) adequately. I point out that the potential consequences of mistaken
handling of the GBC become more severe as forward-looking behavior is
incorporated in macroeconometric models. Furthermore, contrary to pop
ular belief, careful treatment of the GBC is shown to be a matter of p
rimary importance even in models of the short and medium term. (C) 199
8 Elsevier Science S.A.