Growth rate using rangerun

[Dario Maimone Ansaldo Patti]

Dear All,

I have the following dataset (example for 2 countries only)

* Example generated by -dataex-. To install: ssc install dataex
clear
input float id int year float KOFGI
1 1970  18.34902
1 1971 18.884224
1 1972  18.59799
1 1973 18.547972
1 1974  18.25414
1 1975 18.986671
1 1976 18.041212
1 1977   19.2219
1 1978 17.466097
1 1979 18.411556
1 1980  19.13836
1 1981  19.69164
1 1982  19.90187
1 1983 20.342705
1 1984  20.47284
1 1985 20.522293
1 1986  20.94291
1 1987 21.479084
1 1988 22.152985
1 1989 21.926537
1 1990 22.432707
1 1991 22.645435
1 1992  23.23357
1 1993 23.404493
1 1994 23.599314
1 1995 23.688236
1 1996  23.70481
1 1997 24.139524
1 1998 24.408384
1 1999 24.375294
1 2000    24.294
1 2001   24.2185
1 2002   24.9463
1 2003  25.81677
1 2004  27.24133
1 2005 31.655056
1 2006 32.122574
1 2007  33.30513
1 2008 36.267826
1 2009  35.98519
1 2010  37.13828
1 2011  37.94497
1 2012  38.35154
1 2013  38.96558
1 2014  38.16883
1 2015  38.65878
2 1970 32.352722
2 1971  33.23895
2 1972 28.809397
2 1973 29.616055
2 1974 31.840567
2 1975  31.43512
2 1976 34.001904
2 1977 32.496044
2 1978 28.450764
2 1979 33.879417
2 1980  34.50627
2 1981 33.457706
2 1982 32.067017
2 1983  33.50897
2 1984  33.22702
2 1985 31.079716
2 1986  32.47196
2 1987 33.614937
2 1988  32.27095
2 1989 33.805332
2 1990  29.19638
2 1991 32.818542
2 1992  39.27695
2 1993   41.3872
2 1994  39.91748
2 1995  43.01009
2 1996   39.7592
2 1997  43.18169
2 1998  45.02961
2 1999  45.71342
2 2000  48.72862
2 2001  53.70942
2 2002  55.58897
2 2003  55.25804
2 2004  53.04132
2 2005  56.60674
2 2006  59.30991
2 2007  61.91549
2 2008  63.61581
2 2009  65.83179
2 2010  66.71543
2 2011  63.43282
2 2012  60.50565
2 2013  63.60769
2 2014  66.34361
2 2015 67.185555
end

I would generate the growth rate of the variable KOFGI using a rolling window over 5 years. I tried the following:

program rolling
tsset id year
gen lnKOFGI=ln(KOFGI)
gen rkof=(lnKOFGI-L5.lnKOFGI)/4
end

rangerun rolling, interval (year -4 0) use (id year rkof)

I run everything, but at the end the variable rkof does not show up at all. I am sure I am making a mistake in the code. Any hint about?

Thanks in advance,

Dario

[Nick Cox]

I have no objection to rangerun (from SSC, as you are asked to explain), but I can't see that you need it here.

tsset id year
gen lnKOFGI = ln(KOFGI)
gen rkof=(lnKOFGI-L5.lnKOFGI)/4

gets you there directly. (At a guess, not specifying that your program uses KOFGI looks like a bug to me.)

[Dario Maimone Ansaldo Patti]

Hi Nick, you are totally right. I don't need it at all. My bad. I do not know why I was stack with rangerun.