List of Articles RDM Open Access Article Abstract Page Full-Text 1 - Generalization of the RDM model in Data Envelopment Analysis Hamed Taherzadeh Ghasem Tohidi Bo Hsiao Open Access Article Abstract Page Full-Text 2 - Effect of Relocation and Rotation on Radial Efficiency Scores for a Partially Negative Data Problem S .Sarkar Open Access Article Abstract Page Full-Text 3 - Allocation models for DMUs with negative data Ghasem Tohidi Maryam Khodadadi