There is a fundamental difficulty in the analysis of performance in European property markets caused by the lack of long-term data series and the poor quality of what data is available. In many cases, the best data that is available over more than the last few years is prime rent and yield series quoted either quarterly or annually. This is in stark contrast to the data available in North America, where data are more objective and reflective of the ëwholeí market. Two questions therefore arise: - Is it possible to adapt analysis techniques developed in the US, designed to work with objective, ëwhole marketí data to European markets where the available data is scarcer and much more subjective in nature? - Are conclusions based on ëprimeí rents applicable to the market as a whole, or just representative of a small part of the market? In this paper we have used information available from CB Richard Ellis in a number of European cities to generate average transacted rent series. The relationship between these average rent series and a number of other measures of ërentí such as the traditional prime rent, peak rent agreed, and IPD valuation based series where available is examined to establish whether the differences between the behaviour of prime rents and íthe marketí is significant. We also examine some of the commonly held beliefs about prime rents ñ that they are less volatile than average rents ñ that they are leading indicators of whole market movements ñ to see if they are justified.