1999 Population and Housing Census - IPUMS Subset

Vietnam, 1999

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Reference ID

VNM_1999_PHC_v01_M_v7.5_A_IPUMS

Producer(s)

Bureau of The Central Steering Committee for the 1999 Population and Housing Census. General Statistics Office., IPUMS

Metadata

Documentation in PDF DDI/XML JSON

Study website

Created on

Sep 29, 2011

Last modified

Sep 03, 2025

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Age (VN1999A_AGE)

Data file: VNM1999_PHC-P-H.dat

Overview

Type: Discrete

Decimal: 0

Start: 191

End: 193

Width: 3

Range: -

Format: Numeric

Questions and instructions

Literal question

<svar a="all" v="VN99A404 VN99A405 VN99A406">4. In what solar calendar month and year was (Name) born? ________ <div class="i1">Month _ _ Year 1_ _ _</div> </svar>

Categories

Value	Category
000	0
001	1
002	2
003	3
004	4
005	5
006	6
007	7
008	8
009	9
010	10
011	11
012	12
013	13
014	14
015	15
016	16
017	17
018	18
019	19
020	20
021	21
022	22
023	23
024	24
025	25
026	26
027	27
028	28
029	29
030	30
031	31
032	32
033	33
034	34
035	35
036	36
037	37
038	38
039	39
040	40
041	41
042	42
043	43
044	44
045	45
046	46
047	47
048	48
049	49
050	50
051	51
052	52
053	53
054	54
055	55
056	56
057	57
058	58
059	59
060	60
061	61
062	62
063	63
064	64
065	65
066	66
067	67
068	68
069	69
070	70
071	71
072	72
073	73
074	74
075	75
076	76
077	77
078	78
079	79
080	80
081	81
082	82
083	83
084	84
085	85
086	86
087	87
088	88
089	89
090	90
091	91
092	92
093	93
094	94
095	95
096	96
097	97
098	98
099	99
100	100
101	101
102	102
103	103
104	104+

Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.

Interviewer instructions

<svar a="all" v="VN99A404 VN99A405 VN99A406">Question 4: In what solar calendar month and year was (name) born? Interviewers need to ask respondent and fill in his/her actual month and year of birth by solar calendar. Interviewers fill in month of birth in two cells in the line for "month". If the month of birth is less than 10, interviewers place "0" in the cell on the left. Filling in the last 3 digits of year of birth in the 3 cells for the line "year". Note: For persons who were born before April 1899 (100 years old and older), interviewers should also report their information on "List of elderly aged 100 years and older" (appendix 5) after filling in their month and year of birth. In fact, it is difficult to have correct information on month and year of birth in solar calendar for many people, especially for elderly. Therefore, interviewers should pay attention to several points: a) Respondent only remembers his/her month, year of birth or age by lunar calendar: <div class="i1">When respondent answer month of birth, interviewers should reconfirm if it is by solar calendar or lunar calendar. If respondent use lunar calendar, interviewers should add 1 unit to have correct solar calendar month of birth (usually, lunar calendar is one month behind solar calendar). If respondent only remembers year of birth by lunar calendar, interviewers should use "Lunar calendar and solar calendar conversion table" (appendix 2) to convert lunar calendar year into solar calendar year. In cases where respondent only remembers "zodiac" (chi) (such as: rat, buffalo, tiger, cat, etc.) of his/her year of birth by lunar calendar and can't remember stem/branch (can) (such as: Giap, At, Binh, Dinh, etc.) of that lunar calendar year, interviewers need to ask respondent's age and use "Lunar calendar and solar calendar conversion table" to define year of birth in solar calendar for that person. In a case, respondent only remember his/her age using lunar calendar, interviewers estimate his/her year of birth in solar calendar, as follow: Year of enumeration (1999) - age in lunar calendar + 1 = Year of birth in solar calendar</div> b) Respondent doesn't remember month, year of birth by either lunar calendar or solar calendar <div class="i1">Respondent doesn't remember month of birth: Interviewers need to ask several questions in order to approximate month of birth in solar calendar. If respondent is still not able to report month of birth, interviewers fill in code (**) (not available) in the cells for month of birth. Respondent doesn't remember year of birth and age: Interviewers can ask several questions to define respondent's age. If respondent is still not able to report his/her age, interviewers may estimate respondent's age (based on his/her appearance, age of the first child, age of brother/sister, etc.), then year of birth in solar calendar. Interviewers shouldn't fill in code "not available" or leave year of birth blank.</div> </svar>

Description

Definition

This variable indicates the age of the person in years.

Universe

Vietnam 1999: All persons

concept

Concept

var_concept.title	Vocabulary
Demographic Variables -- PERSON	IPUMS

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