Recently, increasing interest on the issue of fractional cointegration has emerged from theoretical and empirical viewpoints. Here, as opposite to the traditional prescription of unit root observables with weak dependent cointegrating errors, the orders of integration of these series are allowed...

This paper proposes a model where an upstream monopolist sells an input to a downstream industry, which may alternatively acquire a perfect substitute for the monopolist's input from a competitive industry. By vertically integrating with a downstream firm, the upstream monopolist may charge a...

In this paper we build a model of financial intermediation that explains the GDP variability pattern of an economy during the development process. We find evidence that per capita output is more volatile in middle-income economies than in both low and high-income economies. We show that, if the...

In this paper we test whether the dynamic behavior of stock market volatility in six emerging economies has changed over the period 1976:01-2004:12. This period corresponds to years of profound development of both the financial and the productive sides in these emerging countries, but also to...

This article proposes a general class of joint diagnostic tests for parametric conditional mean and variance models of possibly nonlinear and/or non-Markovian time series sequences. The new tests are based on a generalized spectral approach and, contrary to existing procedures, they do not need...

A general method for testing the martingale difference hypothesis is proposed. The new tests are data-driven smooth tests based on the principal components of certain marked empirical processes that are asymptotically distribution-free, with critical values that are already tabulated. The...

We estimate and compare the forecasting performance of several dynamic models of returns of different hedge fund strategies. The conditional mean of return is an ARMA process while its conditional volatility is modeled according to the GARCH specification. In order to take into account the high...

In this article we study a general class of goodness-of-fit tests for the conditional mean of a linear or nonlinear time series model. Among the properties of the proposed tests are that they are suitable when the conditioning set is infinite-dimensional; are consistent against a broad class of...

The aim of this work is to analyze the influence of a method for baseline fluctuation (BLF) cancellation for electromyographic (EMG) signals on automatic methods for measurement of the motor unit action potential (MUAP) duration. These methods include four conventional automatic methods (CAMs)...

I analyze a sample of contracts for the acquisition of technology by Spanish firms, where I observe firm and technology characteristics, as well as the type of scheduled payments, whether fixed and/or variable. I find first that technology type influences the chances of the parties reaching an...