The most relevant European Commission documents on methods of conducting evaluation studies are listed below:
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Indicative Guidelines on evaluation methods: evaluation during programming period. Working Document No. 5
document in English 
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New Programming period 2007-2013
Commission methodological paper giving guidelines on the calculation of public Or equivalent structural spending for the purpose of additionality. Working Document No. 3
documents in Polish
document in English 
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Guidelines on methodology for the cost benefit analysis. New programming period 2007-2013. Methodological working documents. EC Working Document No. 4.
document in Polish 
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