Efficiency analysis with panel data: a study of Portuguese dairy farms

David Hallam*, Fernando Machado

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


The technical efficiency of Portuguese dairy farms is measured using frontier production functions estimated from panel data. Alternative estimators are compared and evaluated. The results suggest an average efficiency of 60 to 70 per cent. The relationship between efficiency and farm characteristics is explored. Efficiency appears to be positively correlated with farm size, but independent of degree of specialisation. The implications of the results for alternative development strategies are considered.

Original languageEnglish
Pages (from-to)79-93
Number of pages15
JournalEuropean Review of Agricultural Economics
Issue number1
Publication statusPublished - 1996


  • Efficiency
  • Milk
  • Panel data
  • Portugal


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