In many developing and emerging economies, frequent power outages are often a consequence of electricity rationing, stemming from the insufficient generation capacity to meet peak demand. In an effort to minimize the disruption caused by sudden power outages, utilities often implement scheduled...

The Russian invasion of Ukraine on February 24, 2022 dramatically disrupted the global supply of crude oil and agricultural commodities. As a consequence, the prices of oil and agricultural commodities increase substantially and many countries face the problem of high food inflation. Against...

Breitung and Candelon (2006) in <italic>Journal of Econometrics</italic> proposed a simple statistical testing procedure for the noncausality hypothesis at a given frequency. In their paper, however, they reported some theoretical results indicating that their test severely suffers from quite low power when the...