Below we will draw a dataset as a box where in the box the variables go across and the observations go down See append if you want to combine datasets vertically append adds observations to the existing variables That is an oversimpli64257cation be ID: 36105
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2[U]22Combiningdatasets Alsosee[D]crossforalessfrequentlyusedcommandthatformseverypairwisecombinationoftwodatasets.SeeMitchell(2010,chap.6)formoreinformationoncombiningdatasetsinStata.ReferencesGolbe,D.L.2010.Statatip83:Mergingmultilingualdatasets.StataJournal10:152–156.Gould,W.W.2011a.Mergingdata,part1:Mergesgonebad.TheStataBlog:NotElsewhereClassied.http://blog.stata.com/2011/04/18/merging-data-part-1-merges-gone-bad/. .2011b.Mergingdata,part2:Multiple-keymerges.TheStataBlog:NotElsewhereClassied.http://blog.stata.com/2011/05/27/merging-data-part-2-multiple-key-merges/.Mitchell,M.N.2010.DataManagementUsingStata:APracticalHandbook.CollegeStation,TX:StataPress.