Package: EquiTrends 1.0.0.9000

EquiTrends: Equivalence Testing for Pre-Trends in Difference-in-Differences Designs

Testing for parallel trends is crucial in the Difference-in-Differences framework. To this end, this package performs equivalence testing in the context of Difference-in-Differences estimation. It allows users to test if pre-treatment trends in the treated group are “equivalent” to those in the control group. Here, “equivalence” means that rejection of the null hypothesis implies that a function of the pre-treatment placebo effects (maximum absolute, average or root mean squared value) does not exceed a pre-specified threshold below which trend differences are considered negligible. The package is based on the theory developed in Dette & Schumann (2024) <doi:10.1080/07350015.2024.2308121>.

Authors:Ties Bos [aut, cre], Martin Schumann [ctb]

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EquiTrends.pdf |EquiTrends.html✨
EquiTrends/json (API)
NEWS

# Install 'EquiTrends' in R:
install.packages('EquiTrends', repos = c('https://tiesbos.r-universe.dev', 'https://cloud.r-project.org'))

Peer review:

Bug tracker:https://github.com/tiesbos/equitrends/issues

Uses libs:
  • openblas– Optimized BLAS
  • c++– GNU Standard C++ Library v3

On CRAN:

3.54 score 1 stars 4 scripts 141 downloads 4 exports 37 dependencies

Last updated 3 months agofrom:c73132528c. Checks:OK: 9. Indexed: yes.

TargetResultDate
Doc / VignettesOKNov 03 2024
R-4.5-win-x86_64OKNov 03 2024
R-4.5-linux-x86_64OKNov 03 2024
R-4.4-win-x86_64OKNov 03 2024
R-4.4-mac-x86_64OKNov 03 2024
R-4.4-mac-aarch64OKNov 03 2024
R-4.3-win-x86_64OKNov 03 2024
R-4.3-mac-x86_64OKNov 03 2024
R-4.3-mac-aarch64OKNov 03 2024

Exports:maxEquivTestmeanEquivTestrmsEquivTestsim_paneldata

Dependencies:bdsmatrixcliclubSandwichcollapsedigestdplyrfansiFormulagenericsgluelatticelifecyclelmtestmagrittrMASSmaxLikmiscToolsnlmenloptrpillarpkgconfigplmR6rbibutilsRcppRcppArmadilloRcppParallelRdpackrlangsandwichtibbletidyselectutf8vctrsVGAMwithrzoo

Readme and manuals

Help Manual

Help pageTopics
Equivalence Testing for Pre-Trends in Difference-in-Differences DesignsEquiTrends-package EquiTrends
Finding the restricted placebo coefficients for the maximum equivalence test based on the bootstrap approachesboot_optimization_function
Data Construction Function for EquiTrendsEquiTrends_dataconstr
Input Checks Function for EquiTrendsEquiTrends_inputcheck
Equivalence Test for Pre-trends based on the Maximum Absolute Placebo CoefficientmaxEquivTest
Additional input checks for the maxEquivTest functionmaxTest_error
An internal function of the EquiTrends Maximum Equivalence Testing procedure using the Bootstrap approaches.maxTestBoot_func
An internal function of the EquiTrends Maximum Equivalence Testing procedure using the Intersection Union approach.maxTestIU_func
Finding the minimum equivalence threshold for the equivalence test based on the IU procedure for the maximum placebo coefficient.maxTestIU_optim_func
Equivalence Test for Pre-trends based on the Mean Placebo CoefficientmeanEquivTest
An internal function of the EquiTrends Mean Equivalence Testing proceduremeanTest_func
Finding the minimum equivalence threshold for the mean equivalence testmeanTest_optim_func
Print maxEquivTestBoot objectsprint.maxEquivTestBoot
Print maxEquivTestIU objectsprint.maxEquivTestIU
Print meanEquivTest objectsprint.meanEquivTest
Print rmsEquivTest objectsprint.rmsEquivTest
Equivalence Test for Pre-trends based on the RMS Placebo CoefficientrmsEquivTest
Additional input checks for the rmsEquivTest functionrmsTest_error
An internal function of the RMS Equivalence Testing procedurermsTest_func
Calculating the constrained variance of the residuals for the Boostrap approaches in the EquiTrends Maximum Equivalence Testing procedure, according to Dette & Schumann (2024).sigma_hathat_c
Checking input for the sim_paneldata functionsim_check
Simulating a panel data for a binary treatmentsim_paneldata
Calculating the critical value for the W distribution as construced in Dette & Schumann (2024).W_critical_value