Response to questions:
1. Missing values are not included in the logistic regressions.
2. Only flooring was used for Vietnam 2002.
3. and 4. Both v205 and v225 are used. Toilets should be improved but not shared. Also please check country specific variables since many times sharing is part of the original data. I have attached files for when the questions were not asked.
5. When slab is not asked, only VIP latrines are considered improved. Ventilated pit latrine in Benin is improved.
6. If either water supply or toile inadequate then household has an unmet basic need in sanitation.
7. Number of workers has a minimum of 1 for any household. The number is the sum of all interviewed women who are working and their partners if working.
8. Highest level of education for workers is determined in two parts: the education of any household member 25 to 64 and for members not attending school ages 15 to 24. If no data on whether attending school, is assumed that is not attending.
9. Yes, tube well or borehole is adequate water supply for rural areas.

Best regards,
Shea