Grape assortment should meet the demands of the wine sector and enable continuous development of both the grape and wine sectors. The influence of grape assortment in terms of assortment size and product function/product consistency on the technical efficiency of grape-growing family farms in Macedonia was analysed. A two-stage Data Envelopment Analysis (DEA) method extended with bootstrapping was applied. The analysis revealed very high potential for revenue increases. Farmers with lower variety diversification, specializing in growing local/regional wine grape varieties and table grape varieties, achieved higher efficiency. Thus the ongoing revitalization and investments in Macedonian grape assortment should primarily be directed towards regionally recognized wine grapes and table grape varieties. Grape variety diversification is generally not recommended.

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