IV.calc: Instrumental variable analysis for multiple imputed datasets.
In bgravesteijn/bgravesteijn: My favorite functions

Using an instrumental variable approach, calculate the effect estimate for a therapy. As instrument, any type of instrument may be used (continuous/ordinal/binary/categorical). The therapy must be a binary variable, and the outcome may be both binary (logistic regression) as ordinal (proportional odds regression). Make sure the assumptions are correct, before using this funciton!

1 2	IV.calc(instrument = NULL, therapy = NULL, outcome = NULL, mids = NULL)

`instrument`	A character value of the name of the instrumental variable (any type)
`therapy`	A character value of the name of the binary therapy
`outcome`	A character value of the name of the outcome variable, both binary as ordinal.
`mids`	A mids object, of the multiple imputed dataset which we will use for the IV analysis.