help for mbsens

Help for mbsens - Obtain the Rosenbaum bounds for using the results of matching

mbsens treated strata outcomevar gamma_min gamma_increment gamma_max

Description

mbsens is used for calculating the binary sensitivity metric (gamma) using McNemar's statistic using the results of matching as the input. (Ref: Rosenbaum, Paul R(2002) Observational studies. Springer-Verlag). The input parameters are the counts of discordant pairs (wherein the control and treated observations vary with respect to the output). Note that discordant_count1 is always less than discordant_count2 and gamma_increment is a number like 0.01 (or 1 or 2) at which you would want gamma_min to be incremented to reach gamma_max.

Acknowledgements

This program is named mbsens and is written by Hemang C Subramanian and Eric Overby at the Georgia Institute of Technology.

Limitations

This version of the program works well with k2k based matching only.

Options

treated This is the name of the variable in the matched sample which indicates treatment. This variable takes a value of 0 or 1 ONLY.

strata This is the name of the variable in the matched sample which indicates the count of strata, or identifier for each matched pair.

outcomevar This is the name of the variable in the matched sample which indicates the outcome of the regression. This variable takes a value of 0 or 1 ONLY.

gamma_min This is the start of Gamma's range.

gamma_increment This is the increment at which Gamma would be modified.

gamma_max This is the maximum value of Gamma.

Examples

mbsens treated cemresultmstrata outputvar 1 1 6

Output

Gamma Lower-Bound Upper-Bound
1 .0024 .0024
2 0 .963
3 0 1
4 0 1
5 0 1
6 0 1

Author

Hemang C Subramanian
hemang.subramanian@scheller.gatech.edu
Eric Overby
eric.overby@scheller.gatech.edu