Changes in version 1.1.4 (2024-08-28)                  

Minor changes

  - replace dontrun{} with donttest{} in an example code in dbw()
    function

                        Changes in version 1.1.3                        

Minor changes

  - Add a citation of the article proposing the distribution balancing
    weighting (Katsumata 2024) published in Political Science Research
    and Methods

                        Changes in version 1.1.2                        

Bug fixes

  - Fix an issue in assigning column names for std_comp() function when
    there is only one covariate for the propensity score model.

                        Changes in version 1.1.1                        

Bug fixes

  - Update examples for plot.dbw() function.

                        Changes in version 1.1.0                        

Minor changes

  - Add "normalize" argument to dbw() function for "method = "dbw"". If
    set "FALSE", it estimates the non-normalized distribution balancing
    weights.
  - Add internal functions for estimating the non-normalized
    distribution balancing weights.
  - Add "normalize" component to dbw class.
  - Add some examples for estimating non-normalized distribution
    balancing weights.
  - Update the README files

Bug fixes

  - Revise error and warning messages.

                        Changes in version 1.0.4                        

Minor changes

  - Delete unnecessary calculation in DC algorithm.
  - Add explanation for "formula_y" not to include the treatment
    variable.
  - Add an error message when "formula_y" includes the treatment
    variable.
  - Fix typos in a warning message in dbw().

Bug fixes

  - Fix issues in calculating the derivatives of the regularization
    terms.
  - Fix an issue in std_comp() function when the number of covariates is
    one.

                        Changes in version 1.0.3                        

Bug fixes

  - Fix typos in DESCRIPTION file and an error in dbw().

                        Changes in version 1.0.2                        

Bug fixes

  - Fix typos and delete unnecessary spaces in the DESCRIPTION file.

                        Changes in version 1.0.1                        

Minor changes

  - Use dontrun() in the example for the time constraint.

                        Changes in version 1.0.0                        

Major changes

  - Improve the DC algorithm for "method = "dbw"".

Minor changes

  - Revise the variance-covariance matrix estimation for "method =
    "dbw"".
  - Add "tol" option, which is the tolerance parameter for "method =
    "dbw"".
  - Add "init_lambda" option, which is a parameter for "method = "dbw""
    to set the lambda value for the initial values estimation.

                        Changes in version 0.5.0                        

Minor changes

  - Revert the internal calculation of eta when lambda > 0.

                        Changes in version 0.4.1                        

Minor changes

  - Normalize the estimated weights in "plot.dbw()" function.

                        Changes in version 0.4.0                        

Minor changes

  - Slightly change the internal calculation of eta when lambda > 0.

                        Changes in version 0.3.0                        

Minor changes

  - Add "std_comp()" function, which generates a complete-case data
    frame with standardized covariates for propensity score estimation.
    This function is meant to be used before dbw() with regularization
    (lambda > 0).

Bug fixes

  - incomplete case adjustment for weights.

                        Changes in version 0.2.2                        

Bug fixes

  - Scale checks when lambda > 0.

                        Changes in version 0.2.1                        

Bug fixes

  - Outcome name extraction for "method = "AO"".

                        Changes in version 0.2.0                        

Minor changes

  - Add "vcov" option, which indicates whether to estimate the variance.
  - Delete unused "std" function.

                        Changes in version 0.1.0                        

Minor changes

  - Add references.

                     Changes in version 0.0.1.9000                      

Major changes

  - This is the first release of dbw.