Chapter 1 Stock Return and Inflation: An Analysis Based on the State-Space Framework.- Chapter 2 Diffusion Index Model Specification and Estimation: Using Mixed Frequency Datasets.- Chapter 3 Testing for Neglected Nonlinearity Using Regularized Artificial Neural Networks.- Chapter 4 On the Use of the Flexible Fourier Form in Unit Roots Tests, Endogenous Breaks, and Parameter Instability.- Chapter 5 Testing for a Markov-Switching Mean in Serially-Correlated Data.- Chapter 6 Nonlinear Time Series Models and Model Selection.- Chapter 7 Nonstationarities and Markov Switching Models.- Chapter 8 Has Wealth Effect Changed Over Time? Evidence from Four Industrial Countries.- Chapter 9 A Simple Specification Procedure for the Transition Function in Persistent Nonlinear Times Series Models.- Chapter 10 Small Area Estimation with Correctly Specified Linking Models.- Chapter 11 Forecasting Stock Returns: Does Switching between Models Help?.- Chapter 12 The Global Joint Distribution of Income and Health.