Conducts causal inference with interactive fixed-effect models. It
    imputes counterfactuals for each treated unit using control group
    information based on a linear interactive fixed effects model that
    incorporates unit-specific intercepts interacted with time-varying
    coefficients. This method generalizes the synthetic control method to the
    case of multiple treated units and variable treatment periods, and improves
    efficiency and interpretability. See Xu (2017)
    <doi:10.1017/pan.2016.2> for details.

Build display tables from tabular data with an easy-to-use
    set of functions. With its progressive approach, we can construct
    display tables with a cohesive set of table parts. Table values can be
    formatted using any of the included formatting functions. Footnotes
    and cell styles can be precisely added through a location targeting
    system. The way in which 'gt' handles things for you means that you
    don't often have to worry about the fine details.

Provides tools to measure the reliability of an Information Retrieval test collection.
  It allows users to estimate reliability using Generalizability Theory and map those estimates onto
  well-known indicators such as Kendall tau correlation or sensitivity.

Tools to make it easier to work with "tables" of 'grobs'. The
    'gtable' package defines a 'gtable' grob class that specifies a grid
    along with a list of grobs and their placement in the grid. Further
    the package makes it easy to manipulate and combine 'gtable' objects
    so that complex compositions can be built up sequentially.

Provides functions to analyze data exported from 'Google Takeout'. The package supports unzipping archives and extracting user review data from Google Business Profile exports into tidy data frames for further analysis.

Tools to streamline the extraction, processing, and visualization of
    Computable General Equilibrium (CGE) results from 'GTAP' models. Designed for
    compatibility with both .har and .sl4 files, the package enables users to
    automate data preparation, apply mapping metadata, and generate high-quality
    plots and summary tables with minimal coding. 'GTAPViz' supports flexible export
    options (e.g., Text, CSV, 'Stata', or 'Excel' formats).
    This facilitates efficient post-simulation analysis for
    economic research and policy reporting. Includes helper functions to filter,
    format, and customize outputs with reproducible styling.