To cite package ‘promotionImpact’ in publications use:

Kim N, Um H, Lee E (2020). promotionImpact: Analysis & Measurement of Promotion Effectiveness. R package version 0.1.3, https://github.com/ncsoft/promotionimpact.

Corresponding BibTeX entry:

  @Manual{,
    title = {promotionImpact: Analysis & Measurement of Promotion
      Effectiveness},
    author = {Nahyun Kim and Hyemin Um and Eunjo Lee},
    year = {2020},
    note = {R package version 0.1.3},
    url = {https://github.com/ncsoft/promotionimpact},
  }