Effort estimation: how valuable is it for a web company to use a cross-company data set, compared to using its own single-company data set?

Emilia Mendes, Sergio Di Martino, Filomena Ferrucci, Carmine Gravino. Effort estimation: how valuable is it for a web company to use a cross-company data set, compared to using its own single-company data set?. In Carey L. Williamson, Mary Ellen Zurko, Peter F. Patel-Schneider, Prashant J. Shenoy, editors, Proceedings of the 16th International Conference on World Wide Web, WWW 2007, Banff, Alberta, Canada, May 8-12, 2007. pages 963-972, ACM, 2007. [doi]

@inproceedings{MendesMFG07,
  title = {Effort estimation: how valuable is it for a web company to use a cross-company data set, compared to using its own single-company data set?},
  author = {Emilia Mendes and Sergio Di Martino and Filomena Ferrucci and Carmine Gravino},
  year = {2007},
  doi = {10.1145/1242572.1242702},
  url = {http://doi.acm.org/10.1145/1242572.1242702},
  researchr = {https://researchr.org/publication/MendesMFG07},
  cites = {0},
  citedby = {0},
  pages = {963-972},
  booktitle = {Proceedings of the 16th International Conference on World Wide Web, WWW 2007, Banff, Alberta, Canada, May 8-12, 2007},
  editor = {Carey L. Williamson and Mary Ellen Zurko and Peter F. Patel-Schneider and Prashant J. Shenoy},
  publisher = {ACM},
  isbn = {978-1-59593-654-7},
}