Hi, I want to do two things in STATA but I do not know the commands to it. The data is of two rounds-2005 and 2012

1. I want to create a new variable called headwage using HOURLYWAGE and to ensure that it appears in front of each household member and I want to ensure that for each head the wage is his/her average in both the rounds.
I have tried the following commands: g headwage= HOURLYWAGE if RELATIONSHIPTOHEAD==1
egen headinc=max(headwage),by(IDHH)

However, I do not whether it is correct or not?

2. I want to keep the eldest child in the household using the age variable. However, I cannot figure it out.


IDHH is the unique Household ID

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input int(RELATIONSHIPTOHEAD AGE) double HOURLYWAGES str10 IDHH
 3 16             . "010204010"
 5 13             . "010203010"
 3 38  25.095785141 "010203010"
 5  1             . "010203010"
 1 45 41.4161186219 "010207010"
 4 36             . "010203010"
 3 11             . "010206010"
 3 22   8.469827652 "010201010"
 3 13             . "010201010"
 3 20             . "010204010"
11  7             . "010204010"
 5  6             . "010203010"
 3 21             . "010207010"
 2 34             . "010202010"
 3 16  9.4060611725 "010206010"
 3 15             . "010204010"
 6 65             . "010207010"
 7 60             . "010203010"
 7 18 35.2909507752 "010205010"
 3  2             . "010205010"
 3 18             . "010206010"
 4 34             . "010203010"
 1 45 71.7997131348 "010204010"
 5  5             . "010203010"
 3 34  25.095785141 "010203010"
 3 13             . "010204010"
 3  7             . "010201010"
 5  6             . "010203010"
 2 25             . "010205010"
 1 70             . "010203010"
 2 37             . "010204010"
 2 60             . "010203010"
 3  4             . "010205010"
 3 14             . "010202010"
 3 15             . "010206010"
 2 40  9.4060611725 "010206010"
 2 40             . "010207010"
 3 13             . "010206010"
 5  3             . "010203010"
 3  9             . "010202010"
 5 10             . "010203010"
 1 27 70.5819015503 "010205010"
 6 66             . "010204010"
 3 15             . "010202010"
 3  5             . "010204010"
 1 36 19.4125137329 "010202010"
 1 50 27.3772220612 "010201010"
 1 45             . "010206010"
 2 45             . "010201010"
 7 32             . "010302010"
 2 65             . "010308010"
 1 40 59.0434799195 "010307010"
 1 37 42.0755500794 "010302010"
 3 31 41.5256690979 "010301010"
 3 33 56.5083541871 "010305010"
 1 50 41.1363639832 "010304010"
 2 57             . "010303010"
 3 20 49.3636360169 "010301010"
 5  7             . "010303010"
 5 12             . "010305010"
 3 14             . "010301010"
 2 65             . "010305010"
 5  0             . "010301010"
 3 15             . "010306010"
 2 55             . "010301010"
 5  1             . "010305010"
 1 80             . "010305010"
 5  1             . "010305010"
 5  2             . "010301010"
 2 34 63.1133232117 "010302010"
 1 60 34.3826332093 "010301010"
 4 32  8.2455730438 "010308010"
 2 50             . "010309010"
 5  5             . "010305010"
 3 30             . "010309010"
 3 20             . "010301010"
 4 31             . "010305010"
 3 24             . "010309010"
 3 17             . "010301010"
 3 15             . "010307010"
 3 19             . "010304010"
 2 39             . "010307010"
 4 30             . "010301010"
 6 58             . "010302010"
 3 30  65.818183899 "010306010"
 5 10             . "010308010"
 3 13             . "010307010"
10 30             . "010302010"
 5  7             . "010305010"
 3 28             . "010309010"
 1 55             . "010306010"
 3 20             . "010301010"
 2 45             . "010304010"
 3 36  5.8787879944 "010308010"
 5  6             . "010306010"
 3 24             . "010306010"
 5  4             . "010308010"
11 70             . "010306010"
 3 40 29.3939399719 "010308010"
 5  8             . "010308010"
end
label values RELATIONSHIPTOHEAD RO4
label def RO4 1 "Head 1", modify
label def RO4 2 "Wife/Husband 2", modify
label def RO4 3 "Son/Daughter 3", modify
label def RO4 4 "Child-in-Law 4", modify
label def RO4 5 "Grandchild 5", modify
label def RO4 6 "Father/Mother 6", modify
label def RO4 7 "Brother/Sister 7", modify
label def RO4 10 "Sib-in-Law 10", modify
label def RO4 11 "Other rel 11", modify