Using longitudinal data for a panel of Brazilian personal income tax returns between 2011 and 2017 we estimate the elasticity of taxable income (ETI) before and after deductions of personal income tax and calculate optimal taxation levels. The behavioral response is examined using a natural...

Over recent years, several nonlinear time series models have been proposed in the literature. One model that has found a large number of successful applications is the threshold autoregressive model (TAR). The TAR model is a piecewise linear process whose central idea is to change the parameters...

This paper is concerned with modelling time series by single hidden-layer feedforward neural network models. A coherent modelling strategy based on statistical inference is presented. Variable selection is carried out using existing techniques. The problem of selecting the number of hidden units...