Template-Type: ReDIF-Paper 1.0 Author-Name: Kaashoek, J.F. Author-Name-Last: Kaashoek Author-Name-First: Johan Author-Name: van Dijk, H.K. Author-Name-Last: van Dijk Author-Name-First: Herman Author-Person: pva325 Title: Neural networks as econometric tool Abstract: The flexibility of neural networks to handle complex data patterns of economic variables is well known. In this survey we present a brief introduction to a neural network and focus on two aspects of its flexibility . First, a neural network is used to recover the dynamic properties of a nonlinear system, in particular, its stability by making use of the Lyapunov exponent. Second, a two-stage network is introduced where the usual nonlinear model is combined with time transitions, which may be handled by neural networks. The connection with time-varying smooth transition models is indicated. The procedures are illustrated using three examples: a structurally unstable chaotic model, nonlinear trends in real exchange rates and a time-varying Phillips curve using US data from 1960-1997. Creation-Date: 2001-02-19 File-URL: https://repub.eur.nl/pub/1670/feweco20010219155055.pdf File-Format: application/pdf Series: RePEc:ems:eureir Number: EI 2001-05 Keywords: Exchange rates, Neural networks, Nonlinear dynamics, Phillips curve Handle: RePEc:ems:eureir:1670