**Author details**

DC values and citations which is found to be high for *Urban studies* category (*Pearson's coeff.* = 0.878, *p* = .00) and moderated for *Demography* category (*Pearson's coeff.* = 0.542, *p* = .025).

**Category Demography % Urban Studies % Total** Journals 26 40.62 38 59.38 64 Documents 11,361 32.13 23,988 67.87 35,349 Multi-authored documents 6869 32.62 14,188 67.38 21,057 Single-authored documents 4492 31.40 9810 68.60 14,302

Citations 147,024 28.03 377,473 71.97 524,497 Citations/paper 12.94 87.25 15.73 14.83 14.83

Authors per document 2.15 2.06 DC 0.605 0.591 CI 0.591 2068

78 Scientometrics

**Table 3.** Demography versus urban studies multi-authorship (2000–2016).

**Figure 11.** Citations and number of documents according to authorship.

Focusing on the international collaboration, it is shown that both categories have similarities such as a high percentage of documents assigned to a single country. Moreover almost the half of the collaboration produced are no kept across time and frequently end in sporadic Alexander Maz-Machado\* and Noelia Jiménez-Fanjul \*Address all correspondence to: ma1mamaa@uco.es University of Cordoba, Córdoba, Spain
