couexposure4.dta | simulated data on exposure time | cda-couexposure4-supportV2.do scott long 2013-11-13.
couart4.dta | factor variables & languages | cda-couexposure4-supportV2.do scott long 2013-11-13.
couart3.dta | improve labels | cda-couart3-support.do scott long 2009-03-13.
couart2.dta | Revised and cleaed | scott long 2001-01-30.
couart.dta  | RM4CLDV Chapter 8 data | scott long 2000-11-20.