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To cite feisr in publications please use:

Rüttenauer T, Ludwig V (2020). “Fixed Effects Individual Slopes: Accounting and Testing for Heterogeneous Effects in Panel Data or Other Multilevel Models.” Sociological Methods and Research, OnlineFirst. doi:10.1177/0049124120926211, https://osf.io/preprints/socarxiv/k4rnu/.

Corresponding BibTeX entry: 

  @Article{,
    title = {Fixed Effects Individual Slopes: Accounting and Testing
      for Heterogeneous Effects in Panel Data or Other Multilevel
      Models},
    author = {Tobias Rüttenauer and Volker Ludwig},
    year = {2020},
    journal = {Sociological Methods and Research},
    volume = {OnlineFirst},
    doi = {10.1177/0049124120926211},
    url = {https://osf.io/preprints/socarxiv/k4rnu/},
  }

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