emme data frame has 19 rows and 8 variablesdata(emme)countryAustralia Austria Belgium Canada Denmark Finland France Germany Ireland Italy Netherlands NewZealand Norway Portugal Spain Sweden Switzerland UK USAsclrpvjsrSchneider, C. Q., Wagemann, C., Quaranta, M. (2012) How To... Use Software for Set-Theoretic Analysis. Online Appendix to "Set-Theoretic Methods for the Social Sciences". Available at www.cambridge.org/schneider-wagemann