This paper examines the dynamic behaviour of relative prices across seven Australian cities by applying panel unit root test procedures with structural breaks to quarterly consumer price index data for 1972 Q1-2011 Q4. We find overwhelming evidence of convergence in city relative prices. Three common structural breaks are endogenously determined at 1985, 1995, and 2007. Further, correcting for two potential biases, namely Nickell bias and time aggregation bias, we obtain half-life estimates of 2.3-3.8 quarters that are much shorter than those reported by previous research. Thus, we conclude that both structural breaks and bias corrections are important to obtain shorter half-life estimates. examine price index convergence across major US cities. While Chen and Devereux (2003) and Basher and Carrion-i-Silvestre (2009) consider absolute price convergence, others investigate relative price convergence. All these studies use aggregate price indices. However, they were preceded by two influential studies -Engel and Rogers (1996) and Parsley and Wei (1996) that look into the disaggregate prices of various commodities across the US cities. Recently, Crucini and Shintani (2008) have used micro-level price data to investigate persistence of PPP deviations across 13 US cities. The studies that use city-level CPI data from other countries include Carrion-i-Silvestre et al.