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In 1997 the debate in the EU on possible subsidies per olive tree raised a discussion on the number of olive trees in each country. Figures from the subsidy requests in previous years did not match with figures currently announced by national Ministry of Agriculture, mainly coming from a presumably exhaustive olive tree register. In order to get comparable estimates that would be acceptable to all countries, a survey named Olistat was launched with a common methodology, previously agreed by all countries. Final results were very different from a priori data, but finally accepted by all parties. The paper describes the statistical method: sampling plan, field survey rules, estimators and quality control procedures.

Additional information

Authors: EI, EI, JRC-Ispra (IT);JRC-ISPRA (TI), EI, JRC-Ispra (IT)
Bibliographic Reference: Paper presented: the 52nd Session of the International Statistical Union, Helsinki (FI), 10-18th August (1999)
Availability: Available from Publications and Public Relations Unit, Ispra (IT)
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