As an access method, visits to households permit face-to-face interviews, which is the most direct method of engagement, allowing physical examination where this is a necessary part of the enquiry.
· Only one entry per person per household is permitted.
An estimated 13 million Chinese, or 1% of the country's total population, do not have proper household registration permits, or "hukou".
There are no television antennas, fuel tanks, laundry poles, or aboveground swimming pools visible on any property, per the bylaws of the homeowners' association; each household is permitted no more than two pets.
Nearly all the scandals have also involved officials using multiple identity cards and household residence permits, called "hukou," in efforts to evade detection and the limits that many big cities impose on how many residences an individual can buy.
Thus, the household survey permits aggregation of data on occurrence, such as diarrhoea, household opinions of services, costs and so forth.
The longitudinal analysis of these households will permit integrative analyses of complex phenomena such as individual, collective and environmental risk factors of infection, routes of transmission, or determinants of the immune response to infection or vaccination.
In terms of selecting an individual to complete the survey, when all quotas were available, any eligible respondent answering a landline telephone within a household was permitted to complete the survey.
They outlined how much Jewish households were permitted to spend in celebrating the circumcision of a baby boy — "to avoid making gentile neighbors envious," she said, "and also to make sure poorer Jews weren't living above their means".
The Venda chiefs are traditionally custodians of the land for their people, while local headmen permit household groups to occupy and work tracts of land.
