A New Keynesian IS curve for Australia: is it forward looking or backward looking?

This article estimates the forward looking, backward looking and an extended version of the New Keynesian IS curve for Australia. The validity of these models is investigated by imposing the constraint on real rate of interest as well as when the constraint is relaxed. Two measures of output gap, namely <italic>GAP1</italic> (constructed using the unobserved components approach) and <italic>GAP2</italic> (constructed using a quadratic trend) are utilized. Our results suggest that the baseline backward looking and forward looking models are overwhelmingly rejected by the data. This evidence strongly supports the extended backward looking model (with <italic>GAP2</italic>) being relevant for monetary policy analysis.