The paper considers time series GMM models where a subset of the parameters are time varying. The magnitude of the time variation in the unstable parameters is such that efficient tests detect the instability with (possibly high) probability smaller than one, even in the limit. We show that for...

This paper proposes an age-coherent sparse Vector Autoregression mortality model, which combines the appealing features of existing VAR-based mortality models, to forecast future mortality rates. In particular, the proposed model utilizes a data-driven method to determine the autoregressive...

This paper proposes a coherent multi-population approach to mortality forecasting for less developed countries. The majority of these countries have witnessed faster mortality declines among the young and the working age populations during the past few decades, whereas in the more developed...

The main goal of my research is to improve the performance of the EnKF in assimilating real observations in order to accelerate the development of EnKF systems towards operational applications. A Local Ensemble Transform Kalman Filter (LETKF, Hunt et al. 2007) is used as an efficient...

Pollutants emitted by pollution generation sources do not only deteriorate the water quality, but the emissions of greenhouse gas also contribute to the green house effect. Material balance of biomass wastes shows there is a trade-off between water pollution and global warming. Therefore, in...

Taking Daxing District, Beijing, China as a example, benefit evaluation index system of small-town land comprehensive consolidation is established from four aspects of resource benefit, economic benefit, social benefit and ecological benefit. Weight of evaluation index is determined by analytic...

Pollutants emitted by pollution generation sources do not only deteriorate the water quality, but the emissions of greenhouse gas also contribute to the green house effect. Material balance of biomass wastes shows there is a trade-off between water pollution and global warming. Therefore, in...

An examination of the linkages between the emerging stock markets in Warsaw and Budapest and the established markets in Frankfurt and the U.S. By using a four-variable asymmetric GARCH-BEKK model, we find evidence of return and volatility spillovers from the developed to the emerging markets....

This paper investigates stock market interdependence between China, Korea, Japan and the US with particular attention to the impact of the Chinese reforms within a 4x4 asymmetric GARCH-BEKК framework. We find a bi-directional market linkage between China and the US and uni-directional linkages...