| BKF98 This is a nationally representative survey, with sample selection using two-stage stratified random sampling. The used approach, for this investigation, is similar to the one of 1994 with nevertheless, ten strata instead of seven for 1994.
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| BKF98 variables | |
| WEIGHT | Sampling weight |
| SIZE | Household size |
| STRATA | Stratum of the household |
| PSU | Enumeration area of the household |
| STRAT94 | Stratum in which a household lives (7 strata) |
| GSE | Social economic group of the household head |
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| GSE94 | Social economic group of the household head (1994) |
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| SEX | Sex of household head |
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| ZONE | Residence area |
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| TOTEXP | Total household expenditures (F CFA) |
| EXPEQ | Total expenditures per adult equivalent (F CFA) |
| EXPEQZ | Total household expenditures by equivalent adult deflated by (z_1994/z_1998) |
| DEPEQI | Total household expenditures by equivalent adult deflated by (IPC_1994/IPC_1998) |
| NVIEZ | Total household expenditures per capita deflated by (z_1994/z_1998) |
| NVIEI | Total household expenditures per capita deflated by (IPC_1994/IPC_1998) |