An improved version of the volume-synchronized probability of informed trading: A comment

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Journal Article
Critical Finance Review, 2017, 6 pp. 377 - 379
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© 2017 David Easley, Marcos Lopez de Prado, and Maureen O'Hara. Ke and Lin provide a valuable alternative approach to estimating the Volume-Synchronized Probability of Informed Trading (VPIN) measure. As we did with estimation of VPIN's predecessor, PIN, they estimate the parameters underlying their modified VPIN measure. This allows Ke and Lin to extract more information from the available data than we extracted with our direct approximation to VPIN. For markets in which the parameters can be reliably estimated their approach seems both a valuable and viable modification.
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