PHILLIPS.DES year unem inf unem_1 inf_1 unem_2 inf_2 cunem cinf cunem_1 cinf_1 Obs: 49 1. year 1948-1996 2. unem civilian unemployment rate 3. inf CPI inflation rate 4. unem_1 unem lagged once 5. inf_1 inf lagged once 6. unem_2 unem lagged twice 7. inf_2 inf lagged twice 8. cunem unem - unem_1 9. cinf inf - inf_1 10. cunem_1 cunem lagged once 11. cinf_1 cinf lagged once