“The publisher’s fleet includes both open access and toll-access journals. They publish two pairs of journals that are almost identical:
Applied Mathematics & Information Sciences
Applied Mathematics & Information Sciences Letters
Journal of Statistics Applications & Probability
Journal of Statistics Applications & Probability Letters
I don’t understand why a publisher would publish two such closely-related journals.”
The first journal in each pair is probably for full-length articles, while the “Letters” one is for shorter texts (possibly comments). In my field (economics), there are (for example) two similarly related (quite reputable) journals “Applied Economics” and “Applied Economics Letters” published by Taylor & Francis.
