it's not obvious where the alias goes;
here's two examples:
SELECT POPRCTNM,
STUFF((SELECT ','+ CAST(ACTINDX AS varchar)
FROM POP30390 a
WHERE a.POPRCTNM = d1.POPRCTNM
GROUP BY a.ACTINDX
FOR XML PATH(''), TYPE).value('.','VARCHAR(max)'), 1, 1, '')
AS AliasForStuff
FROM POP30390 d1
SELECT POPRCTNM,
AliasForStuff = STUFF((SELECT ','+ CAST(ACTINDX AS varchar)
FROM POP30390 a
WHERE a.POPRCTNM = d1.POPRCTNM
GROUP BY a.ACTINDX
FOR XML PATH(''), TYPE).value('.','VARCHAR(max)'), 1, 1, '')
FROM POP30390 d1
Lowell