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    Home / Central Data Catalog / MLI_1998_PHC_V01_M_V03_A_IPUMS / variable [F2]
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General Census of Population and Housing 1998 - IPUMS Subset

Mali, 1998
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Reference ID
MLI_1998_PHC_v01_M_v03_A_IPUMS
Producer(s)
Central Bureau of the Census, Minnesota Population Center
Collection(s)
Fragility, Conflict and Violence
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Created on
Apr 22, 2011
Last modified
May 03, 2018
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  • Study Description
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  • MLI1998-H-H
  • MLI1998-P-H

Year of birth (ML1998A_0409)

Data file: MLI1998-P-H

Overview

Valid: 0
Invalid: 0
Type: Discrete
Decimal: 0
Start: 168
End: 171
Width: 4
Range: 1909 - 9999
Format: Numeric

Questions and instructions

Literal question
Section B: Individual Characteristics




7. Age

Day ____
Month ____
Year ____
Age _ _
Categories
Value Category
1909 1909 or earlier
1910 1910
1911 1911
1912 1912
1913 1913
1914 1914
1915 1915
1916 1916
1917 1917
1918 1918
1919 1919
1920 1920
1921 1921
1922 1922
1923 1923
1924 1924
1925 1925
1926 1926
1927 1927
1928 1928
1929 1929
1930 1930
1931 1931
1932 1932
1933 1933
1934 1934
1935 1935
1936 1936
1937 1937
1938 1938
1939 1939
1940 1940
1941 1941
1942 1942
1943 1943
1944 1944
1945 1945
1946 1946
1947 1947
1948 1948
1949 1949
1950 1950
1951 1951
1952 1952
1953 1953
1954 1954
1955 1955
1956 1956
1957 1957
1958 1958
1959 1959
1960 1960
1961 1961
1962 1962
1963 1963
1964 1964
1965 1965
1966 1966
1967 1967
1968 1968
1969 1969
1970 1970
1971 1971
1972 1972
1973 1973
1974 1974
1975 1975
1976 1976
1977 1977
1978 1978
1979 1979
1980 1980
1981 1981
1982 1982
1983 1983
1984 1984
1985 1985
1986 1986
1987 1987
1988 1988
1989 1989
1990 1990
1991 1991
1992 1992
1993 1993
1994 1994
1995 1995
1996 1996
1997 1997
1998 1998
9999 Unknown
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
1.2.1. Questions for ALL Household Members




6. and 7. Column P6 and P7: Date of birth and age

The census enumerator should devote to this part a special care, since these questions are by themselves of utmost importance, since the age variable will play a major role in the analysis of the data collected.




6. Column P6: Date of birth

The date of birth in written in Column P6 for the household members who have an official document certifying their date of birth. This date of birth will be converted into integer number of years in Column P7, as explained in the example below. For the under-five children, one shall insist to obtain the proper date of birth.




Principles for determining age from the correspondence tables:

Determining the age shall be done, whenever possible, from a birth certificate. If this is true that in urban areas most children will have a birth certificate, this is however not the case in rural areas. Indeed, the high rate of illiteracy is a major handicap for the functioning of vital registration in rural areas. Therefore, in these areas, the age is expressed as the number of rainy seasons seen by the person.

Furthermore, one should note that in rural areas, references are made to the lunar calendar, translated into vernacular languages.

This is why a correspondence table was established, in order to allow the precise determination of the date of birth for children less than 10 years of age, according to the Gregorian calendar. This technique is based on the knowledge by the respondent of three elements:

1. The number of rainy seasons lived by the child;
2. The name of the lunar month of the birth of the child;
3. The day of birth of the child in the lunar calendar.


Example: A respondent tells you that his or her child has lived 6 rainy seasons, that he or she was born on Ramadan 27. What is the exact date of birth of the child?

[Page 23]

Response: Refer to the correspondence table provided in Annex 2. Read the intersection of line "sounkalo" and Column "6 rainy seasons". You will find that the date of birth lies between February 23, 1993 and March 23, 1993. To obtain the precise date, add 26 (that is 27 - 1) to February 23, which gives 49. Then Subtract 28, corresponding to the number of days in February, and one obtains 21. The child is therefore born on March 21, 1993. Then, one can calculate the age of the child, as if he or she had a birth certificate. If the date of enumeration is March 16, 1998, the child's age is therefore: 4 years and 11 months, or 59 months.

If the child is born on Ramadan 3, the precise date of birth will be obtained as 23+3-1 = 25, and the child's birth date would be February 25, 1993.

In general, if the result of the computation for days is higher than the number of days in the months, one shall subtract this number from the result to obtain the corresponding date.

If the first element of the calendar is known, and the two others are unknown, one could use, when needed, the approximate agricultural calendar (see Annex 3), for an estimation of the child's date of birth.

Description

Definition
This variable indicates the person's year of birth.
Universe
All persons

concept

Concept
var_concept.title Vocabulary
Demographic Variables -- PERSON IPUMS
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