Events

Joint Statistics and Econometrics Seminar Series with Daniel Pena

Hosted by the Department of Statistics

Leverhulme Library, 6th floor of Columbia House

Speaker

Daniel Pena

Daniel Pena

Professor

The next seminar in the LT 2018 Joint Statistics and Econometrics Seminar Series will be with Daniel Pena who is a Professor at Universidad Carlos III de Madrid. You can find details of Daniel's talk below:

Title: Forecasting Multiple Time Series with One-Sided Dynamic Principal Components

Abstract: We define one-sided dynamic principal components (ODPC) for time series as linear combinations of the present and past values of the series that minimize the reconstruction mean squared error. Previous definitions of dynamic principal components depend on past and future values of the series. For this reason, they are not appropriate for forecasting purposes. On the contrary, it is shown that the ODPC introduced in this paper can be successfully used for forecasting high-dimensional multiple time series. An alternating least squares algorithm to compute the proposed ODPC is presented. We prove that for stationary and ergodic time series the estimated values converge to their population analogues. We also prove that asymptotically, when both the number of series and the sample size go to infinity, if the data follows a dynamic factor model, the reconstruction obtained with ODPC converges, in mean squared error, to the common part of the factor model. Monte Carlo results shows that forecasts obtained by the ODPC compare favourably with other forecasting methods based on dynamic factor models.

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