Changes in version 0.1.0 (2025-07-03)                  

  - Initial CRAN submission.
      - CCK estimation is working for case with two periods.
      - Change default parametric specification to cubic polynomial.
      - Bug fix for variable names.

                       Changes in version 0.0.002                       

  - Added sanity checks for unexpected input data.

                       Changes in version 0.0.001                       

  - Initial version.