Emmanuel PAROISSIEN (Université Paris-Sud) at the Economics Seminar

The next RITM Economics Seminar will take place on Monday 16 April, in Gaudemet (Jean Monnet – 54 boulevard Desgranges – 92330 Sceaux). Emmanuel PAROISSIEN (Université Paris-Sud) will present “The Causal Impact of Medals on Wine Producers’ Prices, and the Gains From Participating in Contests“.


The objective of this paper is threefold. First, we estimate the causal effect of wine medals on producers’ prices. Second, we calculate the expected profit obtained by producers from participating in competitions. Third, we investigate the efficiency of wine competitions by measuring to what extent the attributed awards are good quality indicators. Our dataset combines information on transactions between wine producers and wholesale traders (these data are registered by a wine broker who acts as a middleman in this market), with the records from eleven important wine competitions. Our identification strategy exploits a particularity in our data, namely that medals are not only awarded before the transaction dates but sometimes also thereafter. Under weak restrictions, a regression of price on dummies indicating past and future medals (plus controls) allows to uncover two interesting features: i) the difference in the respective dummy estimates identifies the causal effect of a medal, ii) the estimate of the future medal coefficient identifies the correlation between unobserved quality and medal. We find a strong medal impact: our preferred estimate indicates that producers of medaled wines can increase their price by 13\%. The impact for gold is much larger than for silver and bronze, but we cannot reject that the correlation with quality is the same across the three colors. Only a minority of contests attribute medals that are significantly correlated with quality (primarily the ones founded a long time ago, and whose judges are required to evaluate relatively few wines per day). Our profit calculations show that the incentives to participate in wine contests are high.

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