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An implementation of a most commonly used event study methodology, including both parametric and nonparametric tests. It contains variety aspects of the rate of return estimation (the core calculation is done in C++), as well as three classical market models: mean adjusted returns, market adjusted returns and single-index market models. There are 6 parametric and 6 nonparametric tests provided, which examine cross-sectional daily abnormal return (see the documentation of the functions for more information). Furthermore, tests for the cumulative abnormal returns are included.


To install a current stable release from CRAN use:


To install the development version of estudy2 use:

# install.packages("devtools")
# library("devtools")