Measuring efficiency with quasiconcave production frontiers

Article Abstract:

A study was conducted to demonstrate that the production frontiers obtained from Petersen's method may overstate inefficiency for some quasiconcave production frontiers. This means that a decision making unit (DMU) which is inefficient in Petersen's frontiers may be efficient in other quasiconcave production frontiers. Although the free disposal hull (FDH) approach can develop the closest frontier for DMUs, the frontier may not be a quasiconcave one since the FDH approach may result in non-convex input requirement set and/or non-convex output possible set.

Evaluation, Measurement, Industrial efficiency, Economic efficiency, Data envelopment analysis

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A new model of conflict analysis - the three dimensional graph model

Article Abstract:

A three dimensional graph model, its stability analysis and the three most significant factors of conflict analysis are considered for establishing a new model for conflict analysis. The players are classified either as aggressive, defensive or compromising. The three dimensional graph model may be applied for actual problems because the rules governing the actions of the players are based on real-life situations.

Models, Analysis, Social conflict, Stability

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