partial.pre
argument to dpm()
to
use the strategy proposed by Allison
(2022).lavaan
does not
allow non-syntactic variable names.pre()
tag surrounding it. Do not put the entire
interaction inside pre()
.weights
argument.y.free = TRUE
.dpm()
now has the x.free
argument, which
can allow predictor variables to have coefficients that vary by
wave.dpm
objects now have a glance()
method for
the broom
package.x.free
or y.free
are used with
dpm()
.This release contains several important updates and a 1.1.x release is likely to be the one submitted to CRAN.
y.free
is TRUE.y.lag = 0
)y ~ scale(x)
).dpm
models with
update
.dpm
objects now a have a tidy
method via
the broom
package.As a side note, there is now a testing suite in place to
check models for accuracy/consistency with xtdpdml
. That
doesn’t mean there will be no bugs, but it should help prevent any
regressions.
This is a major release with several breaking changes compared to the initial development release.
Most noticeably, the name of the package has been changed from
clfe
to dpm
. This was done to better reflect
the scope of the package — the cross-lagged fixed effects specification
(CFLE) is a special case of the larger group of dynamic panel model
(DPM) specifications availed to users of the package.
Accordingly, what was once the clfe
function is now
called dpm
.
Internally, the dpm
class is now an S4 object that
contains the lavaan
class. This means that any method
implemented for lavaan
objects that isn’t explicitly
defined by this package should simply treat dpm
objects as
if they were lavaan
objects.
The summary
method now has more options and is more
similar to lavaan
’s summary in that regard. Of course, the
summary output is much cleaner and more succinct.
The following arguments have been added to dpm()
:
y.lag
: Equivalent to xtdpdml
’s
ylag
. Specify which lags of the DV to use.y.free
: Equivalent to xtdpdml
’s
yfree
. Allow stability coefficients for the lagged DV to
vary over time.fixed.effects
: Comparable to xtdpdml
’s
re
. Use fixed effects (TRUE
) or random effects
(FALSE
) specification.alpha.free
: Equivalent to xtdpdml
’s
alphafree
. Allow the fixed effects to vary over time.NEWS.md
file to track changes to the
package.The panelr
package was added as a dependency, which has some downstream
effects.
panel_data
function now belongs to
panelr
.panel_data
object type now inherits from
tibble
, which has pluses and minuses but I believe more
upside than downside.WageData
example data is now part of the
panelr
package.