Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
← Back to introduction
## profit *p-*index

### History

## References

The profit indices (Aziz and Rozing 2013) attempt to measure the effect of collaboration on an author's impact. They use a harmonic weighting algorithm and information on author order (assuming that authors in the middle of an author list had the least impact) to estimate effort for each publication. The effort for the *i*^{th} publication is

where

$$D_i=\begin{matrix} 0 & \text{if }A_i\text{ is even} \\ \frac{1}{2A_i} & \text{if }A_i\text{ is odd} \end{matrix}.$$The sum of *E _{i}* for all publications is the number of “monograph equivalents” (a monograph being defined as a single-authored publication). The profit (

This value ranges from 0 to 1, with 0 indicating no contribution of co-authors (all solo-authored papers) and 1 meaning complete contribution from co-authors (a value of exactly 1 is impossible).

Year | profit p |
---|---|

1997 | 0.5619 |

1998 | 0.5516 |

1999 | 0.5680 |

2000 | 0.5179 |

2001 | 0.4509 |

2002 | 0.4842 |

2003 | 0.5054 |

2004 | 0.5048 |

2005 | 0.4527 |

2006 | 0.4541 |

2007 | 0.4679 |

2008 | 0.4875 |

2009 | 0.4728 |

2010 | 0.5100 |

2011 | 0.5225 |

2012 | 0.5288 |

2013 | 0.5457 |

2014 | 0.5278 |

2015 | 0.5366 |

2016 | 0.5424 |

2017 | 0.5533 |

- Aziz, N.A., and M.P. Rozing (2013) Profit (
*p*)-Index: The degree to which authors profit from co-authors.*PLoS ONE*8(4):e59814.