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We have introduced in this paper new variants of two methods for projecting Supply and Use Tables that are based on a distance minimisation approach (SUT-RAS) and the Leontief model (SUT-EURO). We have also compared them under similar and comparable exogenous information, i.e.: with and without exogenous industry output, and with explicit consideration of taxes less subsidies on products. We have conducted an empirical assessment of all of these methods against a set of annual tables between 2000 and 2005 for Austria, Belgium, Spain and Italy. From the empirical assessment, we obtained three main conclusions: (a) the use of extra information (i.e. industry output) generally improves projected estimates in both methods; (b) whenever industry output is available, the SUT-RAS method should be used and otherwise the SUT-EURO should be used instead; and (c) the total industry output is best estimated by the SUT-EURO method when this is not available.

In this paper we confirm the existence of nonlinear dynamics in a time series of airport arrivals. We subsequently propose alternative non-parametric forecasting techniques to be used in a travel forecasting problem, emphasizing the difference between the reconstruction and learning approach. We compare the results achieved in point prediction versus sign prediction. The reconstruction approach offers better results in sign prediction and the learning approach in point prediction.

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In this paper we applied the dynamic system theory to the measurement of the INTRODUCCIÓN: SISTEMAS DINÁMICOS Y ESTABILIDAD DE LOS TIPOS DE CAMBIOEs sobradamente conocido que la volatilidad de los tipos de cambio está caracterizada por una considerable persistencia, de manera que grandes movimientos en los mismos están seguidas de a su vez otros grandes movimientos, existiendo correlación serial positiva en sus cuadrados. Por este motivo, la volatilidad presente y pasada puede utilizarse para predecir la volatilidad futura. En

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