The Matrix 4 (2021)
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Networks represent a useful tool to describe relationships among financial firms and network analysis has been extensively used in recent years to study financial connectedness. An aspect, which is often neglected, is that network observations come with errors from different sources, such as estimation and measurement errors, thus a proper statistical treatment of the data is needed before network analysis can be performed. We show that node centrality measures can be heavily affected by random errors and propose a flexible model based on the matrix-variate t distribution and a Bayesian inference procedure to de-noise the data. We provide an application to a network among European financial institutions.
The Matrix 4 is the fourth installment in the Matrix series, which started with The Matrix in 1999 and was summarily followed by The Matrix: Reloaded and The Matrix: Revolutions in 2003. The first film told the story of Neo (Keanu Reeves), a hacker who turns out to be the prophesied hero of mankind. Following a war between humanity and the machines they built, the machines put everyone in tubes and connected them to the matrix, a kind of virtual reality that people believe is reality. Neo must fight the computer program Agent Smith (Hugo Weaving) with the help of his mentor, Morpheus (Laurence Fishburne) and his new romantic interest, Trinity (Carrie-Anne Moss). After defeating the machines and gaining some superhuman powers at the end of the first film, Neo must go up against bigger adversaries in the second and third installments. 781b155fdc