{"vid":"V4","name":"SERIAL","file_id":"F1","var_dcml":"0","var_intrvl":"contin","var_start_pos":"18","var_end_pos":"27","var_width":"10","var_rec_seg_no":"1","labl":"Household serial number","var_sumstat":[{"value":"0","type":"vald"},{"value":"0","type":"invd"}],"var_txt":"SERIAL is an identifying number unique to each household in a given sample. All person records are assigned the same serial number as the household record that they follow. (Person records also have their own unique identifiers -- see PERNUM.) The combination of SAMPLE and SERIAL provides a unique identifier for every household in the IPUMS-International database; SAMPLE, SERIAL and PERNUM uniquely identify every person in the database. \n\nSERIAL can be used to identify dwellings in some samples.  In these samples, the first 7 digits of SERIAL provide the dwelling number common to all households that were sampled from the same structure.  The last three digits give the sequence of the household within the dwelling.  The following is a list of samples in which dwellings can be inferred:\n\nChile 1970, 1992, 2002\nColombia 1993, 2005\nCosta Rica 1984, 2000\nCuba 2002\nDominican Republic 1981, 2002, 2010\nEcuador 1990, 2001\nGermany 1971\nHungary 1980, 1990, 2001\nJamaica 1982, 1991, 2001\nMalaysia 1970, 1991, 2000\nMexico 1995, 1990, 2000, 2005\nNigeria 2006\nPanama 2000\nPeru 1993, 2007\nPortugal 1981, 1991, 2001\nSpain 1991\nUruguay 2011\nVenezuela 1990, 2001\nVietnam 1989  \n\n\nIn all other samples, the last 3 digits are always zeroes.\n\nSERIAL was constructed for IPUMS-International, and has no relation to the serial number in the original datasets.","var_codeinstr":"SERIAL is a 10-digit numeric variable.\n\nThe last 3 digits of SERIAL indicate household number within dwelling for selected samples noted in the variable description. In all other samples, the last 3 digits are always zeroes.","var_concept":[{"name":"Technical Household Variables -- HOUSEHOLD","vocab":"IPUMS","uri":null}],"var_format":"numeric","var_format_schema":"other","fid":"F1","sid":"9","survey_idno":"ARM_2001_PHC_v01_M_v03_A_IPUMS"}