Dynamic interactions among stock return, Research and Development (R&D) expenses, patent applications based on R&D investment, and the propensity to patent are studied in this work for a panel of firms from the United States. The panel includes technologically similar firms, neck-to-neck, mostly...

A critique that has been directed towards the log-GARCH model is that its logvolatility specification does not exist in the presence of zero returns. A common "remedy" is to replace the zeros with a small (in the absolute sense) non-zero value. However, this renders Quasi Maximum Likelihood...

This paper provides evidence on the effect of recessions and expansions on the productivity growth rate of productivity leaders and followers. We use data of a representative sample of the Spanish manufacturing sector for the period 1991 and 2005. These data allow us to estimate firm level...

A new LM specification procedure to choose between Logistic and Exponential Smooth Transition Autoregressive (STAR) models is introduced. The new decision rule has better properties than those previously available in the literature when the model is ESTAR and similar properties when the model is...

Juan Urrutia ha sido profesor de economía en las Universidades del País Vasco y Carlos III de Madrid. Su impulso a la investigación en el área de economía ha tenido un impacto decisivo en estas dos universidades. En este documento se recogen los textos de las intervenciones que se...

Exponential models of autoregressive conditional heteroscedasticity (ARCH) are attractive in empirical analysis because they guarantee the non-negativity of volatility, and because they enable richer autoregressive dynamics. However, the currently available models exhibit stability only for a...

After facing more than a decade of price stability and economic growth, Spain is experiencing now one of the most significant slowdowns in economic activity across EU economies. There is a general consensus the severity of this slowdown is due to the low level and low rates of growth experienced...

The traditional interpretation of effect of money on prices provided by the Quantity Theory of Money (QTM) has been challenged reciently by the Fiscal Theory of the Price Level (FTP). This paper analyzes the QTM and the FTP from different angle and provides quantitative results of the...