- New argument
emfx(..., predict = c("response", "link"))
, where the latter allows for obtaining the linear prediction for non-linear models. Internally passed asmarginaleffects::slopes(..., type = predict)
, thus avoiding a clash with the toplineemfx(..., type = <aggregration_type>)
argument. (#49)
- Fix ATT calculation for the never-treated case (i..e,
cgroup = "never
) due to incorrect subsetting prior to recovering the marginal effects. Thanks to @paulofelipe for reporting (#37). - Avoid (where possible) or error out if user supplies reserved "group" variable in formula (#41).
- Fix missing autolinks in documentation due to markdown formatting (#44 @etiennebacher).
- Update tests to match upstream changes to fixest.
- Update maintainer email address.
- Update tests to match upstream changes to marginaleffects (#36 @vincentarelbundock).
- Rejigged some internal tests following upstream changes to marginaleffects (#35 @vincentarelbundock).
-
Fixed internal centering procedure and handling of multiple covariate levels (#30, #31). These fixes should have no impact on the main ATT estimates (i.e., typical use of the package). But it may lead to differences in the heterogeneous ATTs---i.e., via the
xvar
arg---which were incorrectly estimated in some cases. Thanks to @PhilipCarthy for flagging and to @frederickluser for helpful discussions -
Fixed internal and upstream bug which was causing model offsets to error (#28, thanks @mariofiorini for the initial report and several others for helpful discussion). Note that this fix requires insight >= 0.19.1.8, which is the development version at the time of writing. More information available here: easystats/insight#759
- Minor updates to internal code and some unit tests to match forthcoming
updates to
marginaleffects 0.10.0. The latter update also brings some notable
performance improvements to
emfx()
.
- Some documentation improvements.
- The Examples have been wrapped in
\dontrun
to avoid triggering CRAN NOTEs on Windows for exceeding 5 seconds execution time. Note that the package homepage still runs these Examples if users want to inspect the output online.
-
Support for estimating heterogeneous treatment effects via the new
etwfe(..., xvar = <xvar>
argument (#16, thanks to @frederickluser). Automatically extends toemfx()
via the latter'sby_xvar
argument (#21). More details are provided in the dedicated "Heterogeneous treatment effects" section of the vignette and help documentation -
The new
emfx(..., collapse = TRUE)
argument can substantially reduce estimation times for large datasets (#19, thanks @frederickluser). This performance boost does trade off against a loss in estimate accuracy. But testing suggests that the difference is relatively minor for typical use cases (i.e., results are equivalent up to the 1st or 2nd significant decimal place, and sometimes even better). Please let us know if you find edge cases where this is not true. More details are available in the dedicated "Performance tips" section of the vignette and help documentation, including advice for combining collapsing withemfx(..., vcov = FALSE)
(which yields an even more dramatic speed boost but at a cost of not reporting any standard errors). -
Users can now use a 1 on the fml RHS to indicate that there are no control variables as part of the
etwfe
call, e.g.etwfe(y ~ 1, ...)
. This provides a second way of indicating no controls, alongside the existing 0 option, e.g.etwfe(y ~ 0, ...)
- Internal code and tests have been updated to account for some upstream
breaking changes in marginaleffects 0.9.0 (#20, thanks @vincentarelbundock).
From the user side, the most notable changes are that we no longer have to call
summary()
onemfx
objects for pretty printing, and that the (former) "dydx" column of the resulting object is now named "estimate". These changes are reflected in the updated documentation.
-
Various documentation improvements. For example, the aforementioned sections on Heterogeneous TEs and Performance tips. I have also removed some warnings about the use of time-varying controls (#17). In truth, I can't quite recall why I included these warnings in the first place and testing confirms that it does not appear to pose a problem for the ETWFE framework. Thanks to Felix Pretis for prompting me to revisit this implicit restriction, including forwarding some relevant correspondence with Prof. Wooldridge.
-
data.table is added to Imports and thus becomes a direct dependency. It was already an indirect dependency through marginaleffects.
-
It's now possible to install the development version of the package from R-universe. Details are provided in the README.
-
The
.Dtreat
indicator variable created during theetwfe
call is now logical instead of integer (#14). This fix yields slightly different effect sizes foremfx
output when applied to non-linear model families (e.g.,etwfe(..., family = "poisson")
. The reason is that we are now implicitly callingmarginaleffects::comparisons
under the hood rather thanmarginaleffects::marginaleffects
. Note that the mainetwfe
coefficients (for any family) are unaffected, and the same is also true foremfx
when applied to a linear model (i.e., the default). -
The (optional)
ivar
argument ofetwfe()
has been moved down the argument order list from second position to fifth (i.e., after thedata
argument). This means that the four required arguments of function now occupy the top positions, which could enable shorter, unnamed notation likeetwfe(y ~ x, year, cohort, dat)
.
-
emfx
now allows (time-invariant) interacted control variables on the fml RHS. -
emfx
now has apost_only
logical argument, which may be useful for plotting aesthetics (but not inference). See the example in the introductory vignette. -
Various improvements to the documentation (restructuring, fixed typos, etc.)
- Initial release.