> All changes to Zelig are documented here. GitHub issue numbers are given after each change note when relevant. See . External contributors are referenced with their GitHub usernames when applicable. Zelig version 5.1.7 ============================== ## Major changes - Removed zeligverse, ZeligChoice, so as to get back up on CRAN. - New maintainer @rtreacy (inheriting same contact email). ## Minor changes - Updates of documentation and external links to meet CRAN checks. - Removal of some tests. Zelig version 5.1.6 ============================== ## Major changes - All Zelig time series models are deprecated. ## Minor changes - `predit`, `fitted`, `residuals` now accept arguments. #320 Zelig version 5.1.5 ============================== ++++ All Zelig time series models will be deprecated on 1 February 2018 ++++ ## Bug fixes - Resolved an issue where `odds_ratios` standard errors were not correctly returned for `logit` and `relogit` models. Thanks to @retrography. #302 - Zelig 4 compatability wrappers now work for `arima` models. Thanks to @mbsabath. #280 - Resolved an error when only `setx` was called with `arima` models Thanks to @mbsabath. #299 - Resolved an error when `summary` was called after `sim` for `arima` models. #305 - Resolved an error when `sim` is used with differenced first-order autoregressive models. #307 - `arima` models return informative error when `data` is not found. #308 ## Minor - Compatibility with testthat 2.0.0 - Documentation updated to correctly reflect that `tobit` wraps `AER::tobit`. #315 - Package terminology in documentation corrected. #316 Zelig version 5.1-4 ============================== ## Major changes - Speed improvements made to `relogit`. Thanks to @retrography. #88 - Returns `relogit` weighted case control method to that described in King and Langche (2001, eq. 11) and used in the Stata `relogit` implementation. #295 - Odds ratios now returned from `summary` with `relogit` models via the `odds_ratios = TRUE` argument. #302 Zelig version 5.1-3 ============================== ## Major changes - Roxygen documentation improvements. ## Minor changes and bug fixes - `zquantile` with Amelia imputed data now working. #277 - `vcov` now works with `rq` quantile regression models. - More informative error handling for conflicting `timeseries` model arguments. #283 - Resolved and issue with `relogit` that produced a warning when the fitted model object was passed to `predict`. #291 Zelig version 5.1-2 ============================== ## Major changes - !EXPERIMENTAL! interface function `to_zelig` allows users to convert fitted model objects fitted outside of Zelig to a Zelig object. The function is called within the `setx` wrapper if a non-Zelig object is supplied. Currently only works for models fitted with `lm` and many estimated with `glm` and `svyglm`. #189 - `get_se` and `get_pvalue` function wrappers created for `get_se` and `get_pvalue` methods, respectively. #269 - If `combine_coef_se` is given a model estimated without multiply imputed data or bootstraps, an error is no longer returned. Instead a list of the models' untransformed coefficients, standard errors, and p-values is returned. #268 - `summary` for `logit` models now accepts the argument `odds_ratios`. When `TRUE` odds ratio estimates are returned rather than coefficient estimates. Thanks to Adam Obeng. PR/#270. - `setx` and `sim` fail informatively when passed ZeligEI objects. #271 ## Minor changes and bug fixes - Resolved a bug where `weights` were not being passed to `svydesign` in survey models. #258 - Due to limited functionality and instability, zelig survey estimations no return a warning and a link to documentation on how to use `to_survey` via `setx` to bipass `zelig`. #273 - Resolved a bug where `from_zelig_model` would not extract fitted model objects for models estimated using `vglm`. #265 - `get_pvalue` and `get_se` now work for models estimated using `vglm`. #267 - Improved `ivreg`, `mlogit`, and getter (#266) documentation. Zelig version 5.1-1 ============================== ## Minor changes - Average Treatment Effect on the Treated (ATT) vignette added to the online documentation - Corrected vignette URLs. Zelig version 5.1-0 ============================== ## Major changes - Introduce a new model type for instrumental-variable regression: `ivreg` based on the `ivreg` from the AER package. #223 - Use the Formula package for formulas. This will enable a common syntax for multiple equations, though currently in Core Zelig it is only enhances `ivreg`. #241 - `zelig` calls now support `update`ing formulas (#244) and `.` syntax for inserting all variables from `data` on the right-hand side of the formula #87. See also #247. - Arbitrary `log` transformations are now supported in `zelig` calls (exept for `ivreg` regressors). #225 - Arbitrary `as.factor` and `factor` transformations are now supported in `zelig` calls. - Restored quantile regression (`model = "rq"`). Currently only supports one `tau` at a time. #255 - Added `get_qi` wrapper for `get_qi` method. - Added `ATT` wrapper for `ATT` method. - `gee` models can now be estimated with multiply imputed data. #263 ## Minor changes and bug fixes - `zelig` returns an error if `weights` are specified in a model estimated with multiply imputed data. (not possible before, but uninformative error returned) - Code improvement to `factor_coef_combine` so it does not return a warning for model types with more than 1 declared class. - Reorganize README files to meet new CRAN requirements. - Switch `bind_rows` for `rbind_all` in `zquantile` as the latter is depricated. #255 - Depends on the survival package in order to enable `setx` for exponential models without explicitly loading survival. #254 - `relogit` now only accepts one `tau` per call (similar to `quantile`). Fixed to address #257. - Additional unit tests. Zelig version 5.0-17 ============================== ## Major changes - New function `combine_coef_se` takes as input a `zelig` model estimated using multiply imputed data or bootstrapping and returns a list of coefficients, standard errors, z-values, and p-values combined across the estimations. Thanks to @vincentarelbundock for prompting. #229 - The following changes were primarily made to re-established Zelig integration with [WhatIf](https://CRAN.R-project.org/package=WhatIf). #236 + Added `zelig_setx_to_df` for extracted fitted values created by `setx`. + Fitted factor level variable values are returned in a single column (not by parameter level) by `zelig_qi_to_df`. - `setrange` (including `setx` used with a range of fitted values) now creates scenarios based on matches of equal length set ranges. This enables `setx` to work with polynomials, splines, etc. (currently only when these are created outside of the `zelig` call). #238 ## Minor changes and bug fixes - Resolve a bug where appropriate `plot`s were not created for `mlogitbayes`. #206 - Arguments (such as `xlab`) can now be passed to `plot`. #237 - `zelig_qi_to_df` and `qi_slimmer` bug with multinomial response models resolved. #235 - Resolved a bug where `coef`, `coefficients`, `vcov`, `fitted`, and `predict` returned errors. Thanks to @vincentarelbundock for initially reporting. #231 - Reduced number of digits show from `summary` for fitted model objects. Zelig version 5.0-16 ============================== ## Major changes - !! Breaking change !! the `get*` functions (e.g. `getcoef`) now use underscores `_` to delimit words in the function names (e.g. `get_coef`). #214 - Added a number of new "getter" methods for extracting estimation elements: + `get_names` method to return Zelig object field names. Also available via `names`. #216 + `get_residuals` to extract fitted model residuals. Also available via `residuals`. + `get_df_residuals` method to return residual degrees-of-freedom. Also accessible via `df.residuals`. + `get_model_data` method to return the data frame used to estimate the original model. + `get_pvalue` and `get_se` methods to return estimated model p-values and standard errors. Thank you to @vincentarelbundock for contributions. #147 - `zelig_qi_to_df` function for extracting simulated quantities of interest from a Zelig object and returning them as a tidy-formatted data frame. #189 - `setx` returns an error if it is unable to find a supplied variable name. - `setx1` wrapper added to facilitate piped workflows for first differences. - `zelig` can handle independent variables that are transformed using the natural logarithm inside of the call. #225 ## Minor changes and bug fixes - Corrected an issue where `plot` would tend to choose a factor level as the x-axis variable when plotting a range of simulations. #226 - If a factor level variable's fitted value is not specified in `setx` and it is multi-modal, the last factor in the factor list is arbitrarily chosen. This replaces previous behavior where the level was randomly chosen, causing unuseful quantity of interest range plots. #226 - Corrected a bug where `summary` for ranges of `setx` would only show the first scenario. Now all scenarios are shown. #226 - Corrected a bug where the README.md was not included in the CRAN build. - `to_zelig_mi` now can accept a list of data frames. Thanks to @vincentarelbundock. - Internal code improvements. Zelig version 5.0-15 ============================== ## Major changes - Allows users to convert an independent variable to a factor within a `zelig` call using `as.factor`. #213 - `from_zelig_model` function to extract original fitted model objects from `zelig` estimation calls. This is useful for conducting non-Zelig supported post-estimation and easy integration with the texreg and stargazer packages for formatted parameter estimate tables. #189 - Additional MC tests for a wide range of models. #160 ## Minor changes - Solved deep assignment issue that returned a series of warnings on build. #172 ## Bug fixes - Resolves a bug from `set` where `sim` would fail for models that included factor level independent variables. #156 - Fixed an issue with `model-survey` where `ids` was hard coded as `~1`. #144 - Fixed `ATT` bug introduced in 5.0-14. #194 - Fixed `ci.plot` bug with `timeseries` models introduced in 5.0-15. #204 Zelig version 5.0-14 ============================== ## Major changes - `mode` has been deprecated. Please use `Mode`. #152 - The Zelig 4 `sim` wrapper now intelligently looks for fitted values from the reference class object if not supplied via the x argument. - New `to_zelig_mi` utility function for combining multiply imputed data sets for passing to `zelig`. `mi` will also work to enable backwards compatibility. #178 - Initial development on a new testing architecture and more tests for `model-*`, Zelig 4 wrappers, `ci.plot`, and the Zelig workflow. - `graph` method now accepts simulations from `setx` and `setrange`. For the former it uses `qi.plot` and `ci.plot` for the latter. - Improved error messages for Zelig 4 wrappers. - Improved error messages if Zelig methods are supplied with too little information. - `model-arima` now fails if the dependent variable does not vary for one of the cases. ## Minor changes - Minor documentation improvements for Zelig 4 wrappers. - Dynamically generated README.md. - Removed plyr package dependency. - `rbind_all` replaced by `bind_rows` as the former is deprecated by dplyr. - Other internal code improvements