Hi all,

I would like to create variables that could identify who is the oldest and youngest children in each household. Any help is much appreciated. An example of my data is as below. While names of variables may look odd, they follow a logic, i.e. each child information in each HH is started with b0* variable and ended with b4*y variables (where * could be 2, 3, 4, 5, and 6, meaning a HH may have 5 children). I hope that labels of each variable may make those variables clear.

Thank you.

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input long qid byte(b02 b22s b32r) int b42y byte(b03 b23s b33r) int b43y byte(b04 b24s b34r) int b44y byte(b05 b25s b35r) int b45y byte(b06 b26s b36r) int b46y
 11 2 2  4 1970 3 1 10 1999 4 1 10 1999 5 1 10 2001 . .  .    .
 13 2 2  2 1950 3 1  3 1975 4 2  5 1979 5 1 10 2005 6 1 10 2006
 15 2 2  2 1950 . .  .    . . .  .    . . .  .    . . .  .    .
 16 2 1  2 1945 3 1  3 1971 4 2  5 1975 5 1 10 1995 6 2 10 1998
 18 2 1  2 1931 3 2 10 1993 4 2 10 1994 . .  .    . . .  .    .
 19 . .  .    . . .  .    . . .  .    . . .  .    . . .  .    .
110 2 1  2 1928 3 1  3 1959 4 2  5 1964 5 2 10 1988 6 1 10 1995
111 2 2  2 1948 3 1  3 1977 4 2  5 1977 5 1 10 2005 6 2 10 2010
112 2 1  3 1977 3 2  5 1981 4 2 10 2005 5 1 10 2006 6 2  2 1940
113 2 2  5 1963 3 1 10 1990 4 2 10 1993 . .  .    . . .  .    .
114 . .  .    . . .  .    . . .  .    . . .  .    . . .  .    .
115 2 2  2 1959 3 1 10 2008 . .  .    . . .  .    . . .  .    .
119 2 1  2 1940 3 2 10 1999 . .  .    . . .  .    . . .  .    .
120 2 2  2 1945 3 2 10 1999 . .  .    . . .  .    . . .  .    .
122 2 2  2 1954 . .  .    . . .  .    . . .  .    . . .  .    .
123 2 1  2 1948 3 2  5 1983 4 1  3 1988 5 1 10 2010 . .  .    .
124 2 2  2 1939 3 1 10 2000 . .  .    . . .  .    . . .  .    .
125 2 1  2 1942 3 1  3 1982 4 2  5 1983 5 1 10 2009 6 2 10 2011
126 . .  .    . . .  .    . . .  .    . . .  .    . . .  .    .
127 . .  .    . . .  .    . . .  .    . . .  .    . . .  .    .
128 2 2  2 1933 . .  .    . . .  .    . . .  .    . . .  .    .
129 2 2  4 1985 3 1  5 1983 4 2 10 2010 . .  .    . . .  .    .
134 2 1  2 1943 3 1  3 1975 4 2  5 1977 5 1 10 2005 . .  .    .
136 2 2  2 1940 3 1  3 1963 4 2  4 1967 5 1  5 1961 6 1 10 1999
137 2 1  3 1976 3 2  5 1977 4 2  3 1980 5 1  3 1983 6 1 10 2003
138 2 2  4 1969 3 1  5 1968 . .  .    . . .  .    . . .  .    .
139 2 1  3 1955 3 2  5 1957 4 1 10 1990 . .  .    . . .  .    .
140 2 1  2 1944 3 1  3 1978 . .  .    . . .  .    . . .  .    .
141 2 1  3 1970 3 2  5 1972 4 1 10 1998 5 1 10 2008 . .  .    .
142 2 2  2 1933 3 2  4 1959 . .  .    . . .  .    . . .  .    .
146 2 2  2 1945 3 1  3 1976 4 1  3 1978 5 2  5 1987 6 1 10 2005
147 2 1  2 1934 3 1  3 1957 . .  .    . . .  .    . . .  .    .
148 2 1  2 1936 3 1  3 1982 4 2  5 1982 5 1 10 2005 6 2 10 2007
149 2 1  2 1945 . .  .    . . .  .    . . .  .    . . .  .    .
150 2 2  2 1950 . .  .    . . .  .    . . .  .    . . .  .    .
151 2 1  3 1975 3 2  5 1978 4 2 10 2007 5 2 10 2010 . .  .    .
152 2 2  2 1958 3 1  3 1986 4 2  5 1986 5 1  3 1992 6 1 10 2006
153 2 1  3 1955 3 2  5 1958 4 1 10 1985 5 1 10 1990 . .  .    .
154 2 1  2 1939 3 1  3 1977 4 2  5 1989 5 2 10 2001 6 2 10 2007
155 2 1 10 2001 3 1 10 1994 . .  .    . . .  .    . . .  .    .
156 2 1  2 1933 3 1  3 1957 4 2  5 1956 5 1 10 1981 6 2 10 1982
159 2 1  3 1962 3 2  5 1966 4 1 10 1986 5 2 10 1988 6 2 10 1996
161 2 1  4 1968 3 1  3 1963 4 2  5 1964 5 2 10 1989 6 1 10 1995
162 . .  .    . . .  .    . . .  .    . . .  .    . . .  .    .
163 2 1  2 1927 3 1  3 1956 4 2  5 1983 5 1 10 2003 . .  .    .
164 2 1  2 1949 3 1  3 1973 4 2  5 1973 5 1  3 1979 6 2  5 1980
167 2 2  2 1948 3 2  4 1978 4 1  5 1983 5 2 10 2010 6 2  4 1980
168 2 1  2 1930 3 1  3 1973 4 2  4 1975 5 1 10 2000 6 2 10 2004
169 2 2  2 1931 3 1  3 1959 4 2  5 1966 5 1 10 1992 . .  .    .
171 2 1  2 1921 3 1  3 1962 4 2  5 1965 5 1 10 1989 6 1 10 2000
173 2 2  2 1938 3 1  3 1970 4 2  5 1987 . .  .    . . .  .    .
175 2 2  2 1943 3 1  3 1980 . .  .    . . .  .    . . .  .    .
176 2 2  2 1945 3 1  3 1979 4 2 10 2000 . .  .    . . .  .    .
177 2 2  2 1943 . .  .    . . .  .    . . .  .    . . .  .    .
178 2 1  2 1946 3 1  3 1974 4 2  5 1975 5 1 10 1995 6 2 10 2005
180 2 2  2 1953 3 1  3 1990 . .  .    . . .  .    . . .  .    .
181 2 1  2 1950 3 1  3 1985 . .  .    . . .  .    . . .  .    .
182 2 1  3 1957 3 2  4 1962 4 1 10 1993 . .  .    . . .  .    .
183 2 2  4 1953 3 2  4 1949 4 1  3 1962 5 2  5 1965 . .  .    .
184 2 2  7 1931 3 2 12 1953 4 1 12 1962 5 2 12 1965 . .  .    .
186 2 1  3 1955 3 2  5 1962 4 1 10 1986 5 2 10 1985 6 1 10 2007
188 2 1  3 1964 . .  .    . . .  .    . . .  .    . . .  .    .
190 2 1  3 1971 3 2  5 1974 4 2 10 2001 5 2 10 2009 . .  .    .
191 2 2  2 1951 3 1  3 1984 . .  .    . . .  .    . . .  .    .
192 2 2  2 1946 3 1  3 1971 4 1  3 1977 . .  .    . . .  .    .
193 2 1  3 1964 3 2  5 1968 4 1 10 2003 5 2 10 1995 . .  .    .
194 2 2  2 1941 3 1 10 1986 4 1 10 2007 . .  .    . . .  .    .
196 2 2  4 1956 . .  .    . . .  .    . . .  .    . . .  .    .
197 2 1  2 1949 3 1  3 1981 4 2  5 1985 5 2 10 2007 . .  .    .
199 2 1  2 1931 . .  .    . . .  .    . . .  .    . . .  .    .
331 2 2  2 1963 3 2  4 1993 . .  .    . . .  .    . . .  .    .
332 2 1  3 1968 3 2  5 1970 4 1 10 1993 . .  .    . . .  .    .
333 2 1  2 1932 3 1  3 1973 4 2  5 1975 5 1 10 1997 6 2 10 2000
336 2 1  2 1947 3 1  3 1975 4 2  5 1979 5 1 10 2002 6 2 10 2006
337 2 1  3 1965 3 2  5 1970 4 1 10 1992 5 1 10 1996 . .  .    .
338 2 2  4 1967 3 1 10 2006 . .  .    . . .  .    . . .  .    .
362 2 1  2 1933 3 1  3 1963 4 2  5 1967 5 2 10 1994 6 1 10 2003
363 2 2  2 1952 3 2  4 1977 4 1 10 1998 . .  .    . . .  .    .
366 2 2  2 1940 3 1  3 1960 4 2  5 1970 5 1 10 1992 . .  .    .
367 2 2  2 1952 3 2 10 1992 . .  .    . . .  .    . . .  .    .
368 2 2  2 1950 3 1 10 2008 . .  .    . . .  .    . . .  .    .
369 2 2  2 1930 3 1  3 1949 4 2  5 1949 5 2 10 1987 6 1 10 1994
382 2 1  2 1929 . .  .    . . .  .    . . .  .    . . .  .    .
383 2 2  2 1939 . .  .    . . .  .    . . .  .    . . .  .    .
384 2 1  2 1940 3 1  3 1975 4 2  5 1982 5 1 10 2006 . .  .    .
385 2 2  2 1951 . .  .    . . .  .    . . .  .    . . .  .    .
387 2 1  2 1937 3 1  3 1977 4 2  5 1980 5 2 10 2006 6 1 10 2009
389 2 2  2 1947 3 1  3 1975 4 2  5 1982 5 1 10 2006 . .  .    .
461 2 2  2 1931 3 1 10 1979 4 2 10 1992 . .  .    . . .  .    .
462 2 1  2 1927 3 1 10 1979 4 2 10 1992 . .  .    . . .  .    .
463 2 2  2 1947 3 1  3 1979 . .  .    . . .  .    . . .  .    .
464 2 1  2 1940 3 1  3 1973 4 2  5 1977 5 2 10 2006 6 1 10 2008
465 2 1  3 1966 3 2  5 1974 4 2 10 2003 5 2 10 2011 . .  .    .
466 2 2  2 1960 . .  .    . . .  .    . . .  .    . . .  .    .
469 2 1  2 1947 3 1  3 1981 4 2 10 1984 5 2 10 2001 6 1 10 2005
491 2 2  2 1961 3 2  4 1983 4 2  4 1991 5 2 10 2011 . .  .    .
493 2 2  2 1935 3 2  4 1958 . .  .    . . .  .    . . .  .    .
494 2 1  3 1982 . .  .    . . .  .    . . .  .    . . .  .    .
496 2 2  2 1944 3 1  3 1973 4 2  5 1977 5 2 10 2001 6 2 10 2009
497 2 2  2 1950 3 2  4 1983 . .  .    . . .  .    . . .  .    .
end
label values b22s LABEL_B22
label def LABEL_B22 1 "Male", modify
label def LABEL_B22 2 "Female", modify
label values b32r LABEL_B32R
label def LABEL_B32R 2 "Spouse", modify
label def LABEL_B32R 3 "Son", modify
label def LABEL_B32R 4 "Daughter", modify
label def LABEL_B32R 5 "Son/daughter in law", modify
label def LABEL_B32R 7 "Parent", modify
label def LABEL_B32R 10 "Grand children", modify
label values b23s LABEL_B23
label def LABEL_B23 1 "Male", modify
label def LABEL_B23 2 "Female", modify
label values b33r LABEL_B33R
label def LABEL_B33R 3 "Son", modify
label def LABEL_B33R 4 "Daughter", modify
label def LABEL_B33R 5 "Son/daughter in law", modify
label def LABEL_B33R 10 "Grand children", modify
label def LABEL_B33R 12 "Other relatives", modify
label values b24s LABEL_B24
label def LABEL_B24 1 "Male", modify
label def LABEL_B24 2 "Female", modify
label values b34r LABEL_B34R
label def LABEL_B34R 3 "Son", modify
label def LABEL_B34R 4 "Daughter", modify
label def LABEL_B34R 5 "Son/daughter in law", modify
label def LABEL_B34R 10 "Grand children", modify
label def LABEL_B34R 12 "Other relatives", modify
label values b25s LABEL_B25
label def LABEL_B25 1 "Male", modify
label def LABEL_B25 2 "Female", modify
label values b35r LABEL_B35R
label def LABEL_B35R 3 "Son", modify
label def LABEL_B35R 5 "Son/daughter in law", modify
label def LABEL_B35R 10 "Grand children", modify
label def LABEL_B35R 12 "Other relatives", modify
label values b26s LABEL_B26
label def LABEL_B26 1 "Male", modify
label def LABEL_B26 2 "Female", modify
label values b36r LABEL_B36R
label def LABEL_B36R 2 "Spouse", modify
label def LABEL_B36R 4 "Daughter", modify
label def LABEL_B36R 5 "Son/daughter in law", modify
label def LABEL_B36R 10 "Grand children", modify