Dear all,

I have a data set consisting of Inflation rates relating to 2-,and 3- digit sectors of Nace Rev.2 (EU statistical classification of economic activities) within 2009-2015. I want to calculate the difference of inflation rate between an 3-digit sector and the relevant 2-digit sector, for each year. For example, the rate is 15.31 for the sector coded as "05" in 2009 and 17.32 for the sector coded as "051". Which I want to calculate is 17.32-15.31=2.01 . Unfortunately I could not get the right result in time series. The example is shown below. Thank you, in advance.

Demet

input str21 nace2 int year double INF
"05" 2009 15.318812147951045
"05" 2010 2.3101129502128344
"05" 2011 10.09227343766727
"05" 2012 13.211662744945482
"05" 2013 8.472921634922345
"05" 2014 3.4376096933995313
"05" 2015 7.340746373002781
"051" 2009 17.325343317663688
"051" 2010 -4.096954738327096
"051" 2011 29.639948867807398
"051" 2012 3.8411925209451825
"051" 2013 -1.6302665737451885
"051" 2014 5.844695104984924
"051" 2015 -8.030866481839862
"052" 2009 13.765451678185132
"052" 2010 2.9714595375722848
"052" 2011 8.045823592896115
"052" 2012 14.002491873175646
"052" 2013 9.428377704779981
"052" 2014 3.203318187219548
"052" 2015 8.666604526712861
"06" 2009 -19.937099786950878
"06" 2010 32.874797814533494
"06" 2011 48.957582455185715
"06" 2012 15.666366645702853
"06" 2013 2.7049818159322867
"06" 2014 8.010905229120812
"06" 2015 -34.49525263049765
"061" 2009 -26.047959050125797
"061" 2010 38.23646238491703
"061" 2011 55.66262112444452
"061" 2012 14.310674749749127
"061" 2013 1.3745259428381438
"061" 2014 8.686079467044364