My data looks like this (where "..." indicates more of the same):
country year wheat_yld rice_yld maize_yld ....
Angola 1980 21,241
Angola 1981 23,701
Angola 1982 24,868
Angola .... ....
Angola 2010 23,939
Ethiopia 1980 25,429
Ethiopia 1981 21,682
Ethiopia 1982 24,752
Ethiopia .... ....
Ethiopia 2010 31,409
....
The variables ending with _yld are yields. These yields are defined as the number of hectograms/hectare of the given crop produced in the country in the given year.
Where X is one of my agricultural yield variables, eg. wheat_yld, I seek to run the following commands:
Code:
xtunitroot ips X, demean xtunitroot ips X, demean trend xtunitroot fisher X, dfuller lags(1) demean xtunitroot fisher X, dfuller lags(1) demean trend xtunitroot fisher X, pperron lags(1) demean xtunitroot fisher X, pperron lags(1) demean trend
Code:
variable ccode not found r(111);
I include a more complete example set of my data below using dataex if helpful. Thanks kindly for any help!
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input long country_codes int year long(wheat_yld maize_yld) 3 1995 8924 16115 3 1996 13090 17154 3 1997 8016 21417 3 1998 8847 17222 3 1999 10711 22375 3 2000 9194 36186 3 2001 11104 27175 3 2002 10739 33480 3 2003 14480 28853 3 2004 13582 31729 3 2005 15057 33864 3 2006 15068 65668 3 2007 12742 85625 3 2008 11038 44714 3 2009 15975 30914 3 2010 14838 25827 7 1980 15596 25703 7 1981 14014 38008 7 1982 20501 30284 7 1983 18405 30303 7 1984 23068 31407 7 1985 16177 35629 7 1986 17819 37450 7 1987 18847 31897 7 1988 18344 37744 7 1989 18947 29103 7 1990 18947 34608 7 1991 18972 40444 7 1992 21809 45237 7 1993 23272 43552 7 1994 20237 42371 7 1995 21675 45223 7 1996 19344 40397 7 1997 22426 45557 7 1998 26088 60780 7 1999 23028 53702 7 2000 24873 54329 7 2001 24934 54553 7 2002 22398 60791 7 2003 20361 64767 7 2004 25441 63931 7 2005 26356 73587 7 2006 25302 59030 7 2007 26234 76655 7 2008 28271 64525 7 2009 19628 55760 9 1990 16344 41821 9 1991 14698 39938 9 1992 17812 51721 9 1993 19658 44261 9 1994 11356 46620 9 1995 17899 48263 9 1996 21673 57689 9 1997 18412 59403 9 1998 19153 47544 9 1999 20066 51212 9 2000 18209 49360 9 2001 18209 46471 9 2002 21076 54929 9 2003 9070 62570 9 2004 19998 56326 9 2005 16348 57983 9 2006 20213 53856 9 2007 9173 49103 9 2008 10788 56912 9 2009 15831 58171 9 2010 15729 55593 14 1980 18990 7146 14 1981 18479 7300 14 1982 18114 7387 14 1983 21090 7829 14 1984 23021 8179 14 1985 21647 8669 14 1986 19282 9246 14 1987 18657 9458 14 1988 17542 9118 14 1989 18246 9417 14 1990 15034 10015 14 1991 16767 9781 14 1992 18534 9319 14 1993 18457 9351 14 1994 18390 9042 14 1995 19483 10700 14 1996 19531 10166 14 1997 20544 10914 14 1998 22408 7339 14 1999 21627 12346 14 2000 22104 20597 14 2001 21643 32216 14 2002 21644 40349 14 2003 21327 40334 14 2004 19527 48243 14 2005 17478 53311 14 2006 15344 52998 14 2007 18471 59812 14 2008 21753 60172 14 2009 21516 56831 14 2010 23959 58378 21 1980 5992 13063 21 1981 6943 16087 end label values country_codes country_codes label def country_codes 3 "Algeria", modify label def country_codes 7 "Argentina", modify label def country_codes 9 "Australia", modify label def country_codes 14 "Bangladesh", modify label def country_codes 21 "Bolivia (Plurinational State of)", modify
0 Response to XTunitroot error r(111) variable ccode not found
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