In this paper, we are going to reconsider the standard Viner Model [Viner, 1950] however under the premise of firm heterogeneity. By means of a graphical analysis we show that a consideration of the degree of firm heterogeneity is important for an evaluation of a preferential trade agreement....

Recently, discussion about the appropriate estimation of gravity trade models has started in agriculture. Here, we are going to review recent developments in the literature. It appears that fixed effects Poisson Pseudo Maximum Likelihood is not only the only consistent estimator [Santos Silva...

Auf volatileren Agrarmärkten gewinnt der Handel mit Optionen zunehmend an Bedeutung. Optionen gestatten die einseitige Absicherung von Preisrisiken, z. B. nur gegen fallende Preise, und stellen ein zunehmend bedeutenderes Instrument für das Risikomanagement von Landwirten und Landhändlern...

Der Handel mit Optionen gewinnt auf volatileren Agrarmärkten zunehmend an Bedeutung. Nun stellt sich die Frage, ob der Optionshandel ein sinnvolles Instrument zur Risikoabsicherung von Landwirten und Landhändlern darstellt oder ob er vielmehr ein Treiber der Agrarpreisvolatilität ist. Die...

Options trading is increasingly important in more volatile agricultural markets. Options allow for unilateral hedging of price risks, e. g. against falling prices only, and are an indispensable risk management instrument for farmers and grain dealers. Concerns that soaring options trading could...

For quite some time long-only index funds have been suspected of being responsible for price increases in agricultural futures markets. This suspicion has prompted demands to drastically limit long-only index funds' scope of activity. Such demands and their underlying diagnoses, however,...

Long-only-Indexfonds stehen seit geraumer Zeit unter Verdacht, für die Preisanstiege an landwirtschaftlichen Warenterminmärkten verantwortlich zu sein. Hieraus wird die Forderung abgleitet, den Aktivitätsradius dieser Indexfonds drastisch einzuschränken. Allerdings stehen solche Forderungen...

Since the work of FEENSTRA (2002), the standard ANDERSON & VAN WINCOOP (2003) Gravity Model has been estimated using a fixed effects approach. However, a fixed effects approach has a major drawback: it does not allow for the estimation of exporter- and importer-invariant variables. Thus,...

The study is devoted to the measurement of productivity and efficiency change in Chinese farming sector over the reform process in the 1980s and 1990s. Within an output distance function framework, an index of total factor productivity is decomposed into technical and allocative efficiency,...

The study is devoted to the measurement of productivity and efficiency change in Chinese farming sector over the reform process in the 1980s and 1990s. Within an output distance function framework, an index of total factor productivity is decomposed into technical and allocative efficiency,...