We consider temporal aggregation of stationary and nonstationary time series with short memory, long memory and antipersistence, within the framework of fractional autoregressive processes. Asymptotically, long memory and antipersistence are preserved whereas short memory components vanish. In...

This paper formulated a short-run model, with an explicit role for monetary policy, for analyzing world oil and gas markets. The model described carefully the parameters of these markets and their vulnerability to business cycles. Estimates showed that short-run demand for oil and gas was price-...

We show that the empirical distribution of the roots of the vector auto-regression of order n fitted to T observations of a general stationary or non-stationary process, converges to the uniform distribution over the unit circle on the complex plane, when both T and n tend to infinity so that...

The hydrocarbons sector has become one of the most dynamic economic activities in the Bolivian economy and the main driver of improved export performance and international reserve accumulation. The central role of the hydrocarbons sector in the economy is attributable to the high levels of...

This paper deals with the factor modeling for high-dimensional time series based on a dimension-reduction viewpoint. Under stationary settings, the inference is simple in the sense that both the number of factors and the factor loadings are estimated in terms of an eigenanalysis for a...

This paper discusses if the Olymipic Games presented a change- not change along the lines of South Koreas leap towards democracy after the Seol Olympics, but some small shift- and how the nature of its Communist rulers dictated its behaviour and its reaction to its events. The author also look...