SURVEY OF INCOME AND PROGRAM PARTICIPATION,
CALENDAR YEAR 2021 LONGITUDINAL WEIGHTS FILE DATA DICTIONARY


	VARIABLE   	TYPE	LENGTH

D 	SSUID      	Char     14
T 	Sample Unit Identifier
     	This identifier is created by scrambling together the PSU, Segment, Serial, Serial Suffix, and Panel of the 
    	original sample address.  It may be used in matching sample units across years.
U 	All persons
V 	00000000000000:99999999999999


D 	PNUM        	Num	3     
T 	Person Number
     	This field differentiates persons within the sample unit. Person number is unique within the sample unit.
U 	All persons
V 	101:499 


D 	SPANEL      	Num	4     
T 	Panel Year
U 	All persons
V 	2018:2021


D 	FINYR2   	Num    14
T 	Final Person longitudinal weight covering the two-year reference period from January 2019 to December 2020
U 	All persons
V 	0.000000:9999999.999999 

D 	FINYR3   	Num    14
T 	Final Person longitudinal weight covering the three-year reference period from January 2018 to December 2020
U 	All persons
V 	0.000000:9999999.999999 

D 	FINYR4   	Num    14
T 	Final Person longitudinal weight covering the three-year reference period from January 2017 to December 2020
U 	All persons
V 	0.000000:9999999.999999