The measuring of market timing abilities in investment portfolios is a relevant and widely analyzed question. Since the traditional parametric methodology can lead to biased results, we apply the nonparametric approach trying to overcome these biases and compare the results obtained by both...

This work studies long-term autocorrelation asymmetries in the dynamics of crude oil markets for prices in the period from 1986 to 2014. Autocorrelations in crude oil price returns are quantified in terms of the Hurst exponent estimated with the rescaled range (R/S) method. The results obtained...

Meeting the goals of sustainable growth of food production and reducing rural poverty requires assisting family farmers to develop more productive, profitable, resource efficient and environmentally friendly farms. Faced with decreasing product prices and increasing production costs during the...

In this paper we derive the asymptotic properties of within groups (WG), GMM and LIML estimators for an autoregressive model with random effects when both T and N tend to infinity. GMM and LIML are consistent and asymptotically equivalent to the WG estimator. When T/N-0 the fixed T results for...