| kpno | person number |
| kficode | income receipt code |
| kfrall | received payment each month |
| kfr01 | payment received in september 2000 |
| kfr02 | payment received in october 2000 |
| kfr03 | payment received in november 2000 |
| kfr04 | payment received in december 2000 |
| kfr05 | payment received in january 2001 |
| kfr06 | payment received in february 2001 |
| kfr07 | payment received in march 2001 |
| kfr08 | payment received in april 2001 |
| kfr09 | payment received in may 2001 |
| kfr10 | payment received in june 2001 |
| kfr11 | payment received in july 2001 |
| kfr12 | payment received in august 2001 |
| kfr13 | payment received in september 2001 |
| kfr14 | payment received in october 2001 |
| kfr15 | payment received in november 2001 |
| kfr16 | payment received in december 2001 |
| kfr17 | payment received in january 2002 |
| kfr18 | payment received in february 2002 |
| kfr19 | payment received in march 2002 |
| kfr20 | payment received in april 2002 |
| kfrnow | is still receiving payment |
| kfrval | last amount received |
| kfrw | weeks covered by last amount received |
| kfrjt | last payment: sole or joint recipient |
| kfrjtpn | pno of joint recipient |
| khid | household identification number |
| kfiseq | income receipt sequence number |
| kfim09l | estimated income in september 2000 |
| kfim10l | estimated income in october 2000 |
| kfim11l | estimated income in november 2000 |
| kfim12l | estimated income in december 2000 |
| kfim01t | estimated income in january 2001 |
| kfim02t | estimated income in february 2001 |
| kfim03t | estimated income in march 2001 |
| kfim04t | estimated income in april 2001 |
| kfim05t | estimated income in may 2001 |
| kfim06t | estimated income in june 2001 |
| kfim07t | estimated income in july 2001 |
| kfim08t | estimated income in august 2001 |
| kfim09t | estimated income in september 2001 |
| kfim10t | estimated income in october 2001 |
| kfim11t | estimated income in november 2001 |
| kfim12t | estimated income in december 2001 |
| kfim01n | estimated income in january 2002 |
| kfim02n | estimated income in february 2002 |
| kfim03n | estimated income in march 2002 |
| kfim04n | estimated income in april 2002 |
| kfrjtvf | joint receipt verification flag |
| kfrvali | imputation flag – kfrval (base) |
| pid | cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |