In this book leading researchers from universities around the world bring together new ideas on measurement and computation of indices for the financial sector. The book is divided into three parts. The first part contains two chapters which present particularly new ideas and applications on models of the supply and demand for monetary assets in the UK. The first paper explores some of the more popular cases in which cointegration is used as a basis for the construction of linear models and, and runs tests for nonlinearity of the linear combination of the cointegrated variables. The second, estimates the money aggregator function, using a new functional form that has a number of properties which make it useful for representing money aggregator functions. The second part contains five chapters on new approaches to hypothesis testing and data analysis. This includes a new approach to the smoothing problem and developing tests for a global maximum. The final section considers problems of money measurement and debates issue central to the performance of Divisia monetary aggregates. The conclusions are that Divisia monetary aggregates outperform their simple sum counterparts in a range of applications.