Data Dictionary: Census 2000
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Survey: Census 2000
Data Source: U.S. Census Bureau
Table: PCT72D. Age Of Householder By Household Income In 1999 Dollars (Asian Alone Householder) [120]
Universe: Households with a householder who is Asian alone
Table Details
PCT72D. Age Of Householder By Household Income In 1999 Dollars (Asian Alone Householder)
Universe: Households with a householder who is Asian alone
Variable Label
PCT072D001
PCT072D002
PCT072D003
PCT072D004
PCT072D005
PCT072D006
PCT072D007
PCT072D008
PCT072D009
PCT072D010
PCT072D011
PCT072D012
PCT072D013
PCT072D014
PCT072D015
PCT072D016
PCT072D017
PCT072D018
PCT072D019
PCT072D020
PCT072D021
PCT072D022
PCT072D023
PCT072D024
PCT072D025
PCT072D026
PCT072D027
PCT072D028
PCT072D029
PCT072D030
PCT072D031
PCT072D032
PCT072D033
PCT072D034
PCT072D035
PCT072D036
PCT072D037
PCT072D038
PCT072D039
PCT072D040
PCT072D041
PCT072D042
PCT072D043
PCT072D044
PCT072D045
PCT072D046
PCT072D047
PCT072D048
PCT072D049
PCT072D050
PCT072D051
PCT072D052
PCT072D053
PCT072D054
PCT072D055
PCT072D056
PCT072D057
PCT072D058
PCT072D059
PCT072D060
PCT072D061
PCT072D062
PCT072D063
PCT072D064
PCT072D065
PCT072D066
PCT072D067
PCT072D068
PCT072D069
PCT072D070
PCT072D071
PCT072D072
PCT072D073
PCT072D074
PCT072D075
PCT072D076
PCT072D077
PCT072D078
PCT072D079
PCT072D080
PCT072D081
PCT072D082
PCT072D083
PCT072D084
PCT072D085
PCT072D086
PCT072D087
PCT072D088
PCT072D089
PCT072D090
PCT072D091
PCT072D092
PCT072D093
PCT072D094
PCT072D095
PCT072D096
PCT072D097
PCT072D098
PCT072D099
PCT072D100
PCT072D101
PCT072D102
PCT072D103
PCT072D104
PCT072D105
PCT072D106
PCT072D107
PCT072D108
PCT072D109
PCT072D110
PCT072D111
PCT072D112
PCT072D113
PCT072D114
PCT072D115
PCT072D116
PCT072D117
PCT072D118
PCT072D119
PCT072D120
Relevant Documentation:
Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Age
The data on age, which was asked of all people, were derived from answers to the long-form questionnaire Item 4 and short-form questionnaire Item 6. The age classification is based on the age of the person in complete years as of April 1, 2000. The age of the person usually was derived from their date of birth information. Their reported age was used only when date of birth information was unavailable.

Data on age are used to determine the applicability of some of the sample questions for a person and to classify other characteristics in census tabulations. Age data are needed to interpret most social and economic characteristics used to plan and examine many programs and policies. Therefore, age is tabulated by single years of age and by many different groupings, such as 5-year age groups.

Median age
Median age divides the age distribution into two equal parts: one-half of the cases falling below the median age and one-half above the median. Median age is computed on the basis of a single year of age standard distribution (see the "Standard Distributions" section under "Derived Measures"). Median age is rounded to the nearest tenth. (For more information on medians, see "Derived Measures".)

Limitation of the data
The most general limitation for many decades has been the tendency of people to overreport ages or years of birth that end in zero or 5. This phenomenon is called "age heaping." In addition, the counts in the 1970 and 1980 censuses for people 100 years old and over were substantially overstated. So also were the counts of people 69 years old in 1970 and 79 years old in 1980. Improvements have been made since then in the questionnaire design and in the imputation procedures that have minimized these problems.

Review of detailed 1990 census information indicated that respondents tended to provide their age as of the date of completion of the questionnaire, not their age as of April 1, 1990. One reason this happened was that respondents were not specifically instructed to provide their age as of April 1, 1990. Another reason was that data collection efforts continued well past the census date. In addition, there may have been a tendency for respondents to round their age up if they were close to having a birthday. It is likely that approximately 10 percent of people in most age groups were actually 1 year younger. For most single years of age, the misstatements were largely offsetting. The problem is most pronounced at age zero because people lost to age 1 probably were not fully offset by the inclusion of babies born after April 1, 1990. Also, there may have been more rounding up to age 1 to avoid reporting age as zero years. (Age in complete months was not collected for infants under age 1.)

The reporting of age 1 year older than true age on April 1, 1990, is likely to have been greater in areas where the census data were collected later in calendar year 1990. The magnitude of this problem was much less in the 1960, 1970, and 1980 censuses where age was typically derived from respondent data on year of birth and quarter of birth.

These shortcomings were minimized in Census 2000 because age was usually calculated from exact date of birth and because respondents were specifically asked to provide their age as of April 1, 2000. (For more information on the design of the age question, see the section below that discusses "Comparability.")

Comparability
Age data have been collected in every census. For the first time since 1950, the 1990 data were not available by quarter year of age. This change was made so that coded information could be obtained for both age and year of birth. In 2000, each individual has both an age and an exact date of birth. In each census since 1940, the age of a person was assigned when it was not reported. In censuses before 1940, with the exception of 1880, people of unknown age were shown as a separate category. Since 1960, assignment of unknown age has been performed by a general procedure described as "imputation." The specific procedures for imputing age have been different in each census. (For more information on imputation, see "Accuracy of the Data.")

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Householder
The data on relationship to householder were derived from the question, "How is this person related to Person 1," which was asked of Persons 2 and higher in housing units. One person in each household is designated as the householder (Person 1). In most cases, the householder is the person, or one of the people, in whose name the home is owned, being bought, or rented. If there is no such person in the household, any adult household member 15 years old and over could be designated as the householder (i.e., Person 1). Households are classified by type according to the sex of the householder and the presence of relatives. Two types of householders are distinguished: family householders and nonfamily householders. A family householder is a householder living with one or more individuals related to him or her by birth, marriage, or adoption. The householder and all of the people in the household related to him or her are family members. A nonfamily householder is a householder living alone or with nonrelatives only.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Income of households
This includes the income of the householder and all other individuals 15 years old and over in the household, whether they are related to the householder or not. Because many households consist of only one person, average household income is usually less than average family income. Although the household income statistics cover calendar year 1999, the characteristics of individuals and the composition of households refer to the time of enumeration (April 1, 2000). Thus, the income of the household does not include amounts received by individuals who were members of the household during all or part of calendar year 1999 if these individuals no longer resided in the household at the time of enumeration. Similarly, income amounts reported by individuals who did not reside in the household during 1999 but who were members of the household at the time of enumeration are included. However, the composition of most households was the same during 1999 as at the time of enumeration.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Asian
A person having origins in any of the original peoples of the Far East, Southeast Asia, or the Indian subcontinent including, for example, Cambodia, China, India, Japan, Korea, Malaysia, Pakistan, the Philippine Islands, Thailand, and Vietnam. It includes "Asian Indian," "Chinese," "Filipino," "Korean," "Japanese," "Vietnamese," and "Other Asian."

Asian Indian
This category includes people who indicated their race as "Asian Indian" or identified themselves as Bengalese, Bharat, Dravidian, East Indian, or Goanese.

Chinese
This category includes people who indicate their race as "Chinese" or who identify themselves as Cantonese, or Chinese American. In some census tabulations, written entries of Taiwanese are included with Chinese while in others they are shown separately.

Filipino
This category includes people who indicate their race as "Filipino" or who report entries such as Philipino, Philipine, or Filipino American.

Japanese
This category includes people who indicate their race as "Japanese" or who report entries such as Nipponese or Japanese American.

Korean
This category includes people who indicate their race as "Korean" or who provide a response of Korean American.

Vietnamese
This category includes people who indicate their race as "Vietnamese" or who provide a response of Vietnamese American.

Cambodian
This category includes people who provide a response such as Cambodian or Cambodia.

Hmong
This category includes people who provide a response such as Hmong, Laohmong, or Mong.

Laotian
This category includes people who provide a response such as Laotian, Laos, or Lao.

This category includes people who provide a response such as Thai, Thailand, or Siamese.

Other Asian
This category includes people who provide a response of Bangladeshi; Bhutanese; Burmese; Indochinese; Indonesian; Iwo Jiman; Madagascar; Malaysian; Maldivian; Nepalese; Okinawan; Pakistani; Singaporean; Sri Lankan; or Other Asian, specified and Other Asian, not specified.