txshift 0.3.5

As of February 2021: * Remove cross-linking to sl3 functions as per request from CRAN. This can be reversed once sl3 is available on CRAN.

As of January 2021: * Simulation experiments testing the performance of the procedures in the presence of loss to follow-up censoring indicate that the TML estimator outperforms the one-step for the EIF-based two-phase sampling correction. Generally, we recommend use of the TML estimator (which remains the default) in all settings, though performance of the one-step estimator is not severely degraded.

As of December 2020: * A delta slot has been added to the txshift class to record the shift. * Hidden slots have been similarly added to the txshift_msm class. * The summary method has been removed, with the functionality now supported by the print methods for the txshift and txshift_msm classes. * The plot method has been amended to support simultaneous confidence bands.

As of October 2020: * Changes all references to the argument C to C_samp for the indicator of inclusion in the second-stage sample. * Adds the new argument C_cens to denote censoring due to loss to follow-up, i.e., prior to the occurrence of the outcome. * Adds a nuisance regression for censoring C_cens and adjusts the estimation procedure so as to use inverse censoring weights in the full-data EIF procedure (NOTE: these are not updated in the two-phase sampling correction). * Renaming of arguments to internal functions and functions themselves: * From est_g to est_g_exp for the exposure mechanism density estimation * From est_ipcw to est_samp for the two-phase sampling mechanism * Add est_g_cens for the loss to follow-up censoring mechanism

txshift 0.3.4

As of September 2020: * Moved sl3 dependency to an Enhances designation for CRAN submission. * As above, removed sl3 from Remotes and added installation safety checks.

As of June 2020: * Add single-knot spline to MSM summarization (msm_vimshift). * Add class and plot method for MSM summarization (msm_vimshift). * Fix bug in msm_vimshift for computing CIs for binary outcomes by switching from manually computing CIs to internally using custom confint method. * Fix bug in msm_vimshift for building lm model objects through weighted regression; move models from plot method to msm_vimshift. * Finish drafting brief paper for Journal of Open Source Software.

txshift 0.3.3

As of April 2020: * Change export status of internal functions (e.g., no longer exporting onestep_txshift and tmle_txshift). * Finish adding Roxygen “details” and “return” slots throughout functions. * Add examples to main estimation functions (txshift, vimshift_msm). * Update argument names and add several assert_that checks. * Change fit_spec terminology to fit_ext for external fits. * Add unit tests for MSM functionality and nuisance parameter estimation.

As of March 2020: * Extensive documentation, including fixing estimation terminology (e.g., one-step instead of AIPW) and adding Roxygen “details” and “return” slots. * Begin adding examples to exported functions.

txshift 0.3.2

As of March 2020: * Corrections to dependencies in preparation for eventual CRAN release. * Change several previously exported functions to internal, including eif, est_Hn, est_Q, est_g, est_ipcw, fit_fluctuation, ipcw_eif_update). * Remove/reduce GitHub-only dependencies (now only sl3). * Change title partially (from “Targeted Learning” to “Efficient Estimation”). * Lock dependency versions (e.g., sl3 >= v1.3.7) * Extensive documentation updates.

txshift 0.3.1

As of December 2019: * Changes arguments of hal9001::fit_hal in pseudo-outcome regression for efficient estimation by explicitly including max_degree = NULL. * Change to TMLE convergence criterion: use a less strict criterion such that | Pn D | sigma / (sqrt(n) max(10, log(n))) instead of 1/n. Empirical studies suggest this curbs issues addressed by over-agressive updates from the targeting step. * Remove pinning of sl3 dependency to a specific tag (formerly v1.2.0). * Lock dependency version: sl3 >= v1.3.6 and hal9001 >= v0.2.5.

txshift 0.3.0

As of October 2019: * Change use of as.data.table to data.table in internal functions to catch up with changes in dependencies.

txshift 0.2.9

As of September 2019: * Remove errant intercept term and lower iterations for fluctuation models. * Change weighting scheme in marginal structural model summarization to weight all estimates identically rather than by inverse variance as a default. * Updates to documentation.

txshift 0.2.8

As of September 2019: * Add safety checks for convergence of fluctuation regressions based on those appearing in drtmle and/or survtmle. * Change default confidence interval type to use marginal CIs across multiple parameters instead of a simultaneous confidence band. * Switch internal parametric regressions to use sl3::Lrnr_glm instead of sl3::Lrnr_glm_fast.

txshift 0.2.7

As of July 2019: * Improve argument names for clarity and update documentation. * Addition of tighter unit tests for both one-step and TML estimators.

As of June 2019: * Pin sl3 dependency to version 1.2.0 of that package for stability.

txshift 0.2.6

As of June 2019: * Changes to arguments of hal9001::fit_hal for pseudo-outcome EIF regression. * Addition of clarifying notes to core internal functions. * Removal of outdated (and commented out) code in core internal functions. * Clarifying alterations to internal function and argument names. * Renaming internal function tx_shift to shift_additive.

txshift 0.2.5

As of June 2019: * Remove inverse weights from estimated efficient influence function necessary for pseudo-outcome regression for efficient IPCW-augmented estimators. * Reduce use of redundant variables across core functions, reorganize functions across files, clarify documentation. * Tweak arguments for fitting pseudo-outcome regression with HAL in order to diagnose performance issues revealed by simulation. * Fix how inverse weights are passed to full-data estimators. * Pare down arguments for the one-step estimation routine.

txshift 0.2.4

As of June 2019: * Introduce bound_propensity function to bound the propensity score away from zero by a factor 1/n, rather than to numerical precision.

As of April 2019: * Minor improvements to documentation and vignettes. * Fix a bug in the output of the IPCW one-step estimator. * Pare down packages listed in imports, moving several to suggests. * Introduce option to compute simultaneous confidence band for working MSMs. * Fix a bug introduced by newly added imputation functionality in sl3.

txshift 0.2.3

As of March 2019: * Introduce functionality for computing one-step estimators to complement the the available TMLEs. * Add initial functionality for summarizing estimated effects across a grid of shifts via working marginal structural models (MSMs).

txshift 0.2.2

As of February 2019: * Added helper functions and caught edge cases in auxiliary covariate for TMLE fluctuation models. * Fixed a bug in how the auxiliary covariate for TMLEs is computed by keeping track of an extra shift g(a+2delta|w). Revised inference machinery to create confidence intervals on the logit scale in the case of binary outcomes.

txshift 0.2.0

As of May 2018: * An initial public release of this package, version 0.2.0. * This version including complete functionality for both standard TML and IPCW-TML estimators.