"Governmental and international lending agencies, as well as private sector firms who engage in international trade, have long been concerned with detecting and determining the magnitude of abnormal pricing in international trade. To detect such abnormal pricings, we present a framework analyzing mi
The Energy Collective
https://dl.acm.org/citation.cfm?doid=986213.986239
http://www.fiu.edu/~ciber/ws/estimating_the_magnitude_2004.pdf