Joint research unit 7235

Estimating the Competitive Storage Model with Trending Commodity Prices

Christophe Gouel, Nicolas Legrand

We present a method to estimate jointly the parameters of a standard commodity storage model and the parameters characterizing the trend in commodity prices. This procedure allows the influence of a possible trend to be removed without restricting the model specification, and allows model and trend selection based on statistical criteria. The trend is modeled deterministically using linear or cubic spline functions of time. The results show that storage models with trend are always preferred to models without trend. They yield more plausible estimates of the structural parameters, with storage costs and demand elasticities that are more consistent with the literature. They imply occasional stockouts, whereas without trend the estimated models predict no stockouts over the sample period for most commodities. Moreover, accounting for a trend in the estimation imply price moments closer to those observed in commodity prices. Our results support the empirical relevance of the speculative storage model, and show that storage model estimations should not neglect the possibility of long-run price trends.

AGENDA

Thursday 9 February 2023

Gender, competitiveness, and reaction to defeat

Claire Mollier

Gender, competitiveness, and reaction to defeat

Thursday 9 February 2023

Doctorants

Claire Mollier

Gender, competitiveness, and reaction to defeat

Friday 10 February 2023

Colloques et Workshops

Digital Economics Workshop

Friday 10 February 2023

Colloques et Workshops

Digital Economics Workshop

Tuesday 14 February 2023

Recherche et Economie et Socioéconomie Politique, des Institutions et des Régulations (RESPIR)

Thibault Mirabel

Firms and Cooperatives: The Social Organizations of Production in Market Economies

Tuesday 14 February 2023

Firms and Cooperatives: The Social Organizations of Production in Market Economies

Thibault Mirabel

Firms and Cooperatives: The Social Organizations of Production in Market Economies

Wednesday 15 February 2023

Pratique du Takaful en France: l’expérience de SAAFI

Ezzedine GHLAMALLAH (CERGAM, Université Aix-Marseille)

Pratique du Takaful en France: l’expérience de SAAFI

Wednesday 15 February 2023

Économies du monde musulman

Ezzedine GHLAMALLAH (CERGAM, Université Aix-Marseille)

Pratique du Takaful en France: l’expérience de SAAFI

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