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Upstream technical efficiency and its determinants: Evidence from non-parametric and parametric analysis of Nigeria exploration and production (E & P)
Published in Cogent Engineering, 2019
Idowu J. Adekunle, Iledare O. Omowumi, Echendu C. Joseph, Achi O. Peter
The variables used for non-parametric analysis in stage one of this study are as shown in Table 2. The inputs and outputs data used were obtained from the Nigerian Department of Petroleum Resources (DPR), Nigerian Bureaus of Statistics, Nigerian National Petroleum Corporation (NNPC) and Ministry of Petroleum Resources. However, to avoid the challenges of imbalances in the data magnitude, we mean normalized the data collected as recommended by Sarkis (2007). Also, looking at the fact that oil and gas reserves are keenly related, we used barrels of oil equivalent (BOE) as the unit of measurement for oil and gas proved reserves.