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# American Housing Survey II - PowerPoint PPT Presentation

American Housing Survey II. Data. Model drives variable selection Selection Criteria Certain MSAs Owners only Known metro status Known year built 103 variables on 21720 observations. Data Download. Go to http://research.umbc.edu/~coates/ec611/owner_housing.zip

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### American Housing Survey II

• Model drives variable selection

• Selection Criteria

• Certain MSAs

• Owners only

• Known metro status

• Known year built

• 103 variables on 21720 observations

• Go to http://research.umbc.edu/~coates/ec611/owner_housing.zip

• Unzip the file using Winzip

• Read it into Excel

• Parse it into columns

• Save as tab delimited text

• Http://research.umbc.edu/~coates/ec611/owner_housing_codebook.html

• Read into Stata

• insheet using “your file name”

• Be sure you have 103 variables, 21720 observations

• Sort control famtyp famrel

• note multiple observations per control

• what are famtyp and famrel?

• Summarize data

• several variables are strings

• note minimums and maximums

• Goal: estimate a hedonic equation for house characteristics

• Consider Bedrms, Baths, halfb, kitch, dens, dining, famrm, laundry, living, rooms, unitsf, lot

• What do you observe?

• Look at maximums and minimums

• Functional form?

• Does each bedroom contribute equally to value?

• Does each bathroom?

• What about area?

• Price or log price?

• Construction cost or purchase price?

• OLS - lprice as function of house characteristics, unitsf and lot

• tabulate characteristics

• tabu varname, gen(varname)

• Sample weights [pw=pwt]