This paper develops a new econometric tool for evolutionary autoregressive models where the AR coefficients change smoothly over time. To estimate the unknown functional form of time-varying coefficients, we propose a mdified local linear smoother. The asymptotic normality and variance of the...

In the last decades a liberalization of the electric market has started; prices are now determined on the basis of contracts on regular markets and their behaviour is mainly driven by usual supply and demand forces. A large body of literature has been developed in order to analyze and forecast...

This paper offers a new method for estimation and forecasting of the linear and nonlinear time series when the stationarity assumption is violated. Our general local parametric approach particularly applies to general varying-coefficient parametric models, such as AR or GARCH, whose coefficients...

This paper develops a systematic Markov Chain Monte Carlo (MCMC) framework based upon Efficient Importance Sampling (EIS) which can be used for the analysis of a wide range of econometric models involving integrals without an analytical solution. EIS is a simple, generic and yet accurate...

By combining two alternative formulations of a test statistic with two alternative resamplingschemes we obtain four different bootstrap tests. In the context of static linear regression modelstwo of these are shown to have serious size and power problems, whereas the remaining two areadequate...

We develop a new targeted maximum likelihood estimation method that provides improved forecasting for misspecified linear autoregressive models. The method weighs data points in the observed sample and is useful in the presence of data generating processes featuring structural breaks, complex...

The Brexit vote has considerably increased economic uncertainty in Europe and beyond. It will likely affect economic performance and in particular investment in the euro area, which are both already relatively weak. The impact of this uncertainty shock on the euro area and the German economy is...

Die Entscheidung für einen Brexit hat die Konjunkturängste innerhalb und außerhalb Europas verstärkt. Die Auswirkungen der mit dieser Entscheidung verbundenen ökonomischen Unsicherheit auf den Euroraum und die deutsche Wirtschaft lassen sich mit ökonometrischen Methoden abschätzen. Einer...

This paper tests the hypothesis that real per capita income growth rates are random walks against the hypothesis implied by models of endogenous growth that they are stationary. Thereby the influence of the choice of different test statistics as well as the choice of the H0 on the test results...

In the last decades a liberalization of the electric market has started; prices are now determined on the basis of contracts on regular markets and their behaviour is mainly driven by usual supply and demand forces. A large body of literature has been developed in order to analyze and forecast...