Cover -- Guest editorial -- Application of a robust data envelopment analysis model for performance evaluation of electricity distribution companies -- Predicting customer satisfaction for distribution companies using machine learning -- DEA window analysis and Malmquist index to assess efficiency and productivity in the Spanish electricity sector -- Analyzing enablers and barriers to successfully project control system implementation in petroleum and chemical projects -- Assessing the regional sustainability performance in China using the global Malmquist-Luenberger productivity index -- An econometric analysis of electricity consumption and real sector performance in Nigeria.