American Housing....

I have read the survey from www.census.gov website. It talked about American Housing Survey.
The AHS conducts a national survey and a metropolitan area survey. Both surveys are conducted during a 3- to 7- month period. What does "AHS" mean??? It means household survey that ask the question about the quality of housing in the United States. They interview visit or telephone the household occupying each housing unit in the sample. For unoccupied units, they obtain information from landlords, rental agents, or neighbors.
The national survey, which gathers information on housing throughout the country, interviews at about 55,000 housing units every 2 years, in odd-numbered years. From 1984, each metropolitan area is represented by a sample of at least 3,200 designated housing units. The units are divided between the central city and the rest of the metropolitan area. They survey the home in the national located. They come from each of the 50 states and the District of Columbia.
Through this survey, you can know how they can survey and understand the life of person, and they can adjustment the life of person. Besides, they can control the standard of living and develop it day by day.