vegetarian research studies

I am new to this forum, and I am also an academic (economist & mathematician). I’m interested in any research papers on vegetarians, mortality, income, insurance, and prescriptions, disease, etc Usually, data sets from census-like reports can be used for statistical analysis in my field. I’m interesting in any logitudinal studies, or surveys related to vegetarians. Thank you.

Have you viewed researches on ? Usually each of their articles has a list of papers to support them.