Monte Carlo simulations are used to study the size and power properties of two stationarity tests developed by Kwiatkowski et al. (1992) [KPSS] and Leybourne and McCabe (1994) [LMC] when the data contain additive outliers. We show that the KPSS tests are very robust to additive outliers whereas...

In this paper we propose an extension of the maximum likelihood seasonal cointegration procedure developed by Lee (1992) for daily time series. We compute the finite sample critical values of the associated test statistics in daily seasonal time series.

In this paper we examine the Environmental Kuznets Curve (EKC) hypothesis using the Ecological Footprint (EF), a more comprehensive indicator of environmental degradation, for ve Latin American countries covering the 1971-2007 period. We test the EKC hypothesis using a traditional quadratic...

In this paper, infrequent large temporary and permanent shocks that have affected the quarterly GDP series for France, the United Kingdom and the United States are analyzed in the post World War II period using the outlier method. Strong proof of permanent and/or transitory shocks are found,...

In this paper we re-examine whether purchasing power parity holds in the long run in China from a two-steps procedure correcting outliers and testing unit roots. Thus, the efficient unit root tests developed by Elliott, Rothenberg and Stock (1996) and Ng and Perron (2001) are applied on the...

We study the probability of rejecting the seasonal unit root tests developed by Hylleberg et al. when they are applied to fractionally integrated seasonal time series. We find that these tests have quite low power and that they lead to a risk of over-differencing. The forecasting performance of...

Using the outliers methodology, the focus of this paper is to present the time series dynamics of the German higher education system before 1945. The outline of the paper is as follows. In Section 2, we define the outliers and describe the outliers identification procedure. We apply this...