| nhid | household identification number |
| npno | person number |
| nficode | income receipt code |
| nfrall | received payment each month |
| nfr01 | payment received in september 2003 |
| nfr02 | payment received in october 2003 |
| nfr03 | payment received in november 2003 |
| nfr04 | payment received in december 2003 |
| nfr05 | payment received in january 2004 |
| nfr06 | payment received in february 2004 |
| nfr07 | payment received in march 2004 |
| nfr08 | payment received in april 2004 |
| nfr09 | payment received in may 2004 |
| nfr10 | payment received in june 2004 |
| nfr11 | payment received in july 2004 |
| nfr12 | payment received in august 2004 |
| nfr13 | payment received in september 2004 |
| nfr14 | payment received in october 2004 |
| nfr15 | payment received in november 2004 |
| nfr16 | payment received in december 2004 |
| nfr17 | payment received in january 2005 |
| nfr18 | payment received in february 2005 |
| nfr19 | payment received in march 2005 |
| nfr20 | payment received in april 2005 |
| nfrnow | is still receiving payment |
| nfrval | last amount received |
| nfrw | weeks covered by last amount received |
| nfrjt | last payment: sole or joint recipient |
| nfrjtpn | pno of joint recipient |
| nfim09l | estimated income in september 2003 |
| nfim10l | estimated income in october 2003 |
| nfim11l | estimated income in november 2003 |
| nfim12l | estimated income in december 2003 |
| nfim01t | estimated income in january 2004 |
| nfim02t | estimated income in february 2004 |
| nfim03t | estimated income in march 2004 |
| nfim04t | estimated income in april 2004 |
| nfim05t | estimated income in may 2004 |
| nfim06t | estimated income in june 2004 |
| nfim07t | estimated income in july 2004 |
| nfim08t | estimated income in august 2004 |
| nfim09t | estimated income in september 2004 |
| nfim10t | estimated income in october 2004 |
| nfim11t | estimated income in november 2004 |
| nfim12t | estimated income in december 2004 |
| nfim01n | estimated income in january 2005 |
| nfim02n | estimated income in february 2005 |
| nfim03n | estimated income in march 2005 |
| nfim04n | estimated income in april 2005 |
| nfrjtvf | joint receipt verification flag |
| nfrvali | imputation flag – nfrval (base) |
| pid | cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |
| nfiseq | income receipt sequence number |