The following information provides details on how the 2016 ACS 1-Year Standard Quality 40th Percentile Recent Mover Gross Rent of $900 was developed for Georgia Metropolitan Portion using the publicly releasable distributions from the 2016 ACS.
The standard quality Recent Mover Gross Rents that HUD uses in generating FMRs are derived from rent distributions
that are prohibited from public release under Title XIII to protect the
confidentiality of respondents. The distributions used in this demonstration
are rounded versions of the actual, protected data.
The rounding scheme is as follows:
0, count = 0
1 to 7, count = 4
all other counts are rounded to the nearest 5 (e.g., 10, 15, 20, 25, etc.)
Calculations using the rounded data may not produce the same result as calculations
using the protected data. The difference between HUD's actual results and those
demonstrated here is inversely related to the size of the area. That is,
the larger the area, the closer the calculation based on the
rounded data is likely to be to the Census base rent computed from the protected data.
"Standard Quality" units and rents are determined by limiting the
full ACS sample by including only responses meeting the following criteria:
a. Occupied rental units paying cash rent
b. Specified renter – on 10 acres or less
c. With full plumbing
d. With full kitchen
e. Not constructed in the last 2 years from the survey date
f. Meals not included in rent
The 2016 ACS did not included a question that could be used to filter public or assisted housing from the rental distributions, however HUD is required to ensure that FMRs exclude non-market rental housing in their computation. Therefore, HUD excludes all units falling below a specified rent level determined from public housing rents in HUD's program databases as likely to be either assisted housing or otherwise at a below-market rent (perhaps due to quality problems not otherwise captured by the survey questions).
The "public housing" rent cut-off for in 2016 is $290.
The following table and calculations demonstrate how the 40th percentile 2016 ACS standard quality Recent Mover Gross Rent is determined for using the public distribution of standard quality Recent Mover Gross Rents.
| Portion of Standard Quality Recent Mover Gross Rent Distribution | Gross Rent Dollar Range | Number of Units | Percent of Eligible Distribution | Cumulative Percent |
|---|---|---|---|---|
| Units below interval containing public housing rent level of $290 |
$0 to $250 | 1,595 | Not in Distribution | Not in Distribution |
| Units in interval containing public housing rent level of $290 |
$251 to $289 | 624.00 | Not in Distribution | Not in Distribution |
| $290 to $299 | 156.00 | 0.1% | 0.1% | |
| Units below interval containing 40th percentile standard quality Recent Mover Gross Rent of $899 |
$300 to $799 | 49,465 | 26.5% | 26.6% |
| Units in interval containing 40th percentile standard quality Recent Mover Gross Rent of $899 |
$800 to $899 | 25,010 | 13.4% | 40.0% |
| Units above interval containing 40th percentile standard quality Recent Mover Gross Rent of $899 |
$900 or more | 111,820 | 60.0% | 100.0% |
| Total Units Above Public Housing Rent in Standard Quality Recent Mover Gross Rent Distribution | 186,451.00 |
The numbers of units with standard quality Recent Mover Gross Rents above and below the Public Housing Rent level of $290 for is determined using linear interpolation over the 780 units in the rent range $251 to $299. Linear interpolation uses the assumption that the 780 units' rents are uniformly distributed in the rent range around the Public Housing Rent level. Under this assumption, the proportion of the rent interval ($49) that is below the Public Housing Rent level is the same as the proportion of units with rents in the interval (780) that have rents below the Public Housing Rent level.
Proportion of rent interval below the Public Housing Rent Level: ($290 - $251) / $49 = 0.7959
Units in the Public Housing Rent Level Interval below the Public Housing Rent Level: 0.7959 x 780 = 620.82
The 40th percentile standard quality Recent Mover Gross Rent for is computed by linear interpolation over the 25,010 units in the rent range $800 to $899. Linear interpolation uses the assumption that the 25,010 units' rents are uniformly distributed in the rent range around the 40th percentile. Under this assumption, the proportion of the rent interval ($100) that needs to be added to the lower limit of the interval to reach the 40th percentile rent is the same as the proportion of units in the interval that needs to be added to the units in lower rent intervals to reach 40 percent of units in the distribution.
40 percent of units = .4 x 186,451.00 = 74,580.40
Units below the 40th percentile rent interval = 49,465.00 + 156.00 = 49,621.00
Units in 40th percentile rent interval needed to reach 40 percent of units = 74,580.40 - 49,621 = 24,959.40
Additional Units as Proportion of Interval = 24,959.40 / 25,010 = 0.9980
Dollars Added to Lower Limit of Interval to reach 40th percentile rent = 0.9980 x $100 = $100
40th percentile standard quality Recent Mover Gross Rent = $800 + $100 = $900
The difference between $900 in the demonstration and the value of $899 shown in the table is due to rounding.
The difference between the actual 2016 ACS Standard Quality Recent Mover Gross Rent of $900 and the demonstration 2016 ACS Standard Quality Recent Mover Gross Rent of $899 computed here is due to the effects of rounding on the public distribution as described above.
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