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| Gouel, Christophe. |
| This paper compares numerical methods for solving the competitive storage model. Since storage implies an inequality constraint, the solution methods must be considered carefully. The model is solved using value function iteration, and several projection approaches, including parameterised expectations and decision rules approximation. Using a penalty function approach to smooth the inequality constraint, perturbation methods are also applied. Parameterised expectations proves the most accurate method, while perturbation techniques are shown inadequate for solving this highly nonlinear model. The endogenous grid method allows rapid solution if supply is assumed to be inelastic. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Binding constraint; Nonlinear rational expectations models; Numerical methods; Agricultural and Food Policy; C63; D84; E37. |
| Ano: 2010 |
URL: http://purl.umn.edu/115430 |
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| Araujo-Enciso, Sergio Rene. |
| Economic theory states that the spatial equilibrium condition is a region where prices can be or not cointegrated. It is when prices are within such a region when they are no cointegrated, when prices are in its boundaries they are not only cointegrated but also fulfilling the Law of One Price (LOP). Nonetheless the econometric techniques assume a mean reverting process in order to test for cointegration, either linear or non linear. This research shows that in the absence of such mean reverting process by using prices in pure equilibrium, cointegration (linear and non linear) is often rejected. Such findings go in line with the Band Threshold Autoregressive Model where the neutral band is a region of no cointegration. Furthermore it can be concluded that... |
| Tipo: Presentation |
Palavras-chave: Spatial Equilibrium Condition; Testing Cointegration; Demand and Price Analysis; Risk and Uncertainty; C15; E37. |
| Ano: 2012 |
URL: http://purl.umn.edu/122545 |
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| Finardi, Corrado; Arfini, Filippo; Turrini, Aida. |
| The present study intends to shed light, both from a descriptive and investigative point of view on the dietary evolution taking place in Europe during last 45 years, using secondary data from FAO FBS, which can cover the entire time span considered and allow for several extrapolation and timeseries analysis, differently than single survey data.. After a clustering of selected european national diets, using specific metrics with respect both to internal and external variety (as measured by appropriate indicators), we intended to check the actual distance that average, national diets have in front of the so called Food Pyramid, which consists in a balance of several food items in adequate proportions and in fact glorifies the healthy virtues of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Diets; Evolution; Clustering; Food pyramid; Europe; Trade; GI; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; E37; Q18. |
| Ano: 2010 |
URL: http://purl.umn.edu/116443 |
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