Analysis of household expenditure surveys since 2008 in 22 Sub-Saharan African countries shows that one-third of all people use electricity. As expected, users are disproportionately urban and rich. In communities with access to electricity, lack of affordability is the greatest barrier to...

Analysis of household expenditure surveys since 2008 in 22 Sub-Saharan African countries shows that one-third of all people use electricity. As expected, users are disproportionately urban and rich. In communities with access to electricity, lack of affordability is the greatest barrier to...

Chiral cell structures have the potential to transform the robot design field because of the structures’ ability to adopt various deformations under uniaxial load, such as twisting and a negative Poisson’s ratio. The rationale that underpins this potential is asymmetric deformation that is...

Improving the voltage window of aqueous supercapacitors beyond 2.5 volts without diminishing their capacitance performance is a big challenge to achieve excellent energy density because of the undesirable water decomposition. Herein, this study developed a novel vanadium phosphate (VPO) of the...

Construction of S-scheme photocatalysts for sustainable hydrogen production has been regarded as a promising route to effectively utilize solar energy. However, the limited contact area blocks extensive migration of charge carriers and restrains the further development of these photocatalysts....

This paper utilizes a unique database to investigate how trading activity affects risk-neutral-skewness (RNS), and how risk attitude affects the return predictability of RNS in China SSE 50ETF option market. We find that the individual investors’ option trading activities play a dominant role...