n Studies in Economics and Econometrics - Extending the EKOP model to estimate the probability of informed trading

Volume 30, Issue 2
  • ISSN : 0379-6205


Easley, Kiefer, O'Hara and Paperman (1996) introduced a model that enables one to estimate the probability of informed trading in a stock using as input data the numbers of buyer and seller initiated trades over a period. Empirical testing suggests that this model does not fit data well. We formulate several extensions of the model improving its ability to fit data and discuss the effects this has on the accuracy of estimating the probability of informed trading.

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