As the DEA method does not normally consider statistical errors, it also does not consider errors in the efficiency frontier specification.
Broad input-output measures that are collected annually provide consistent efficiency rankings across specifications, compared to specifications that utilize specific measures collected infrequently.
This paper finds that the lack of a theoretical input-output combination can lead to highly divergent efficiency rankings across specifications, and that if these specifications are being used to guide policy, policymakers can specification search for their preferred finding.
The present study covers the design specifications, efficiency, along with the comparative analysis of solar stills with latent heat storage system, investigated in the last decade.
A first finding is that because of the lack of a theoretically justified input-output combination, there exists quite considerable variation in country efficiency rankings across specifications.
Our choice of this particular excitation wavelength was based on considerations of optical penetration, the excitation efficiency, and the specifications of commercially available laser diodes.
In the other hand, process algebras have proved their efficiency in the specification of web services orchestrations.
However, users' limited comprehension in the three dimensional space may reduce the efficiency of requirement specification as well as design review process.
In addition, our data suggest that the dose of BMP4 regulates the efficiency of PGC specification.
High efficiency of LM specification was observed with over 60% of the derived cells positive for KDR (Fig. 1D), a proximal LM marker (Yamaguchi et al., 1993) that is also expressed by a broad spectrum of mesodermal progenitors that give rise to cardiomyocytes, SMCs and endothelial cells (ECs) (Ema et al., 2006).
