We reply here, within two business days.

Consulting is free for up to three hours per publication; collaboration and tool building are described on the Data Science Services page.

One or two paragraphs: the research question, the study design, how the data are structured, the modeling approach so far, and where you are stuck. We use this to match your request with the right specialist, and it saves a round of email.

A zipped folder if it helps us see the problem, up to 8 MB. Nothing with restricted data, please.