We propose methods for testing hypothesis of non-causality at various horizons, as defined in Dufour and Renault (1998, Econometrica). We study in detail the case of VAR models and we propose linear methods based on running vector autoregressions at different horizons. While the hypotheses...

Small and medium enterprises have strengthened their importance during the last decades in most industrialized countries, including the United States, Germany, Japan and Canada. The province of Quebec makes no exception as firms of less than 200 employees generate a substantial portion of its...

This paper presents empirical evidence on the relationship between innovative efforts and performance on international markets for the specific case of small firms acting as specialized suppliers. In addition to tangible efforts such as R&D expenditures, intangible efforts are also considered....

We review the econometric literature on measuring the returns to R&D. The theoretical frameworks that have been used are outlined, followed by an extensive discussion of measurement and econometric issues that arise when estimating the models. We then provide a series of tables summarizing the...