00335nas a22001217a 4500008004100000022001400041245002200055260004300077300000700120362001000127650001500137856006100152190206s9999    xx            000 0 und d  a1536-8734  aThe Stata Journal  aCollege Station, TXbStata Pressc2008  av.  a2001-  aStatistics  uhttps://www.stata-journal.com/archives/yCoverage: 2001+