We study the pattern of contagion in volatility along the term structure of oil forwards. We use measures of codependence of returns from quantile regressions to discriminate between integration of the markets for different maturities in the cases of low and high volatility of the returns. Our...

In this paper, we show that central order statistics from strictly stationary and ergodic sequences are strongly consistent estimators of population quantiles provided that the quantiles are unique. We generalize this result to strictly stationary but not necessarily ergodic sequences. We also...

We consider nonparametric estimation of conditional medians for time series data. The time series data are generated from two mutually independent linear processes. The linear processes may show long-range dependence.The estimator of the conditional medians is based on minimizing the locally...