CEMENT.DES year month prccem ipcem prcpet rresc rnonc ip rdefs milemp gprc gcem grprcpet grres grnon gip grdefs gmilemp jan feb mar apr may jun jul aug sep oct nov dec Obs: 312 1. year 1964-1989 2. month 1-12 3. prccem BLS ppi for cement 4. ipcem industrial prod. index, cement 5. prcpet ppi for crude petroleum 6. rresc real residential construction 7. rnonc real nonres. construction 8. ip aggregate index of indus. prod. 9. rdefs real defense spending 10. milemp military employment 11. gprc log(prccem) - log(prccem[t-1]) 12. gcem log(ipcem) - log(ipcem[t-1]) 13. grprcpet log(prcpet) - log(prcpet[t-1]) 14. grres log(rresc) - log(rresc[t-1]) 15. grnon log(rnonc) - log(rnonc[t-1]) 16. gip log(ip) - log(ip[t-1]) 17. grdefs log(rdefs) - log(rdefs[t-1]) 18. gmilemp log(milemp) - log(milemp[t-1]) 19. jan =1 if month == 1 20. feb =1 if month == 2 21. mar =1 if month == 3 22. apr =1 if month == 4 23. may =1 if month == 5 24. jun =1 if month == 6 25. jul =1 if month == 7 26. aug =1 if month == 8 27. sep =1 if month == 9 28. oct =1 if month == 10 29. nov =1 if month == 11 30. dec =1 if month == 12