Is there a way to do 1:1 paired matching of cases and controls in R on multiple variables? I've tried MatchIt function, but even specifying variables as "exact" only results in frequency matching (the final dataset will have exactly equal frequencies of those variables individually, but not in combination). I am hoping to match two datasets with exact pairings of sex and race, as well as with age matched +/- 3 years. Ideally the matching algorithm would prioritize matches that maximize the total number of matches between the datasets, and otherwise would match randomly within those parameters. Any cases or controls that don't have an exact matches would be excluded from the final matched dataset.
Thanks so much for any ideas you have.
