Changes in version 0.1.5 (2026-02-07)                  

  - add function impliedshare_calc() to calculate implied market shares

                 Changes in version 0.1.4 (2024-01-08)                  

  - change input variable names for div_calc() to more generic
    provider_id and provider instead of hosp_id and hospital

  - add variable to designate systems of interest in div_calc() using
    focal_sys_id

  - remove requirement to supply wtp_calc() with party_ind variable

  - add option to expand a single layer of characteristics in
    cell_defn()

                 Changes in version 0.1.3 (2023-01-12)                  

  - First release version