Economic performance of portuguese companies 1989-1999 : a DEA study

摘要: The magazine Exame 500 publishes each year a listing of the top companies by sales volume, along with accompanying financial indicators. This rich data set is underutilized in analysis performed 500, rankings and relative performance being assessed naive fashion. study seeks to provide an enhanced view sectoral Portuguese economy period 1989-1999 using Data Envelopment Analysis (DEA) technique. Additionally, national foreign-owned public private assessed. An results understand why certain sectors perform better than others, how national/ foreign ownership public/ objectives matter. are interpreted particular reference economic background period. Some final comments presented discussing usefulness DEA possible revisions technique as well other limitations study.