merge all Spost test data jsl 2004-11-07
RM4CLDV Chapter 7 data, cleaned 11/20/00, revised 1/15/01.
Combines teaching at university and college.
Combines teaching and research at university.
Use standard NRC prestige categories.
science - 5/3/00 - merge mysci and sciplus
5/24/1998 - add labels to sci.dta and add recoded variables.
RM4CLDV Chapter 2 data, cleaned 11/20/00, revised.
Changed variable label for warm (5/3/01)
Fixed label on yr89 and male
RM4CLDV Chapter 5 data, cleaned 11/20/00, revised.
nomintro2 constructed from nomocc2 (5/3/01)
RM4CLDV Chapter 6 data, cleaned 11/20/00, revised 1/15/01.
corrections made to variable labels -jsl 4/30/01
RM4CLDV Chapter 8 data, cleaned 11/20/00, revised 1/15/01, 1/30/01.
RM4CLDV Chapter 3 data; cleaned 11/20/00, revised 1/15/01.