While the results from the different centres (Barcelona, Karlsruhe, London, Maastricht, Reims and Roma in Europe, Albuquerque, Cleveland and Indianapolis in the US) are diverse, the operating costs per flight-hour controlled in the selected European centres were, on average, more than 60% higher than those in the selected US centres.
A comparison of performance in selected US and European en-route centres
Report commissioneed by the Performance Review Commission
This report provides a comparison of selected US and European en-route centres. It has found that the US centres are significantly more cost-effective.