The impact of VC on startup invention

[Harmouche Abdessamie]

Dear Statalists:
I am studying the impact of VC on startup invention, by focusing on VC characteristics such as the VC age, I used the

 xtpoisson thepatentaplied the1stroundofvc AgeofVC ,fe 

command and I am wondering about the model ?
my data example

* Example generated by -dataex-. For more info, type help dataex
clear
input int(idcomp years) byte(thepatentaplied the1stroundofvc) int AgeofVC
 1 2015 1 0  0
 1 2016 0 0  0
 1 2017 0 0  0
 1 2018 0 0  0
 1 2019 0 0  0
 2 2006 0 0  0
 2 2007 0 0  0
 2 2008 1 0  0
 2 2009 0 0  0
 2 2010 3 0  0
 2 2011 0 0  0
 2 2012 0 0  0
 2 2013 1 0  0
 2 2014 1 0  0
 2 2015 0 0  0
 2 2016 0 0  0
 2 2017 0 0  0
 2 2018 0 0  0
 2 2019 0 0  0
 3 2000 0 0  0
 3 2001 0 0  0
 3 2002 0 0  0
 3 2003 0 0  0
 3 2004 0 0  0
 3 2005 3 0  0
 3 2006 0 0  0
 3 2007 0 0  0
 3 2008 0 0  0
 3 2009 0 0  0
 3 2010 2 0  0
 3 2011 1 0  0
 3 2012 1 0  0
 3 2013 0 0  0
 3 2014 0 0  0
 3 2015 1 0  0
 3 2016 0 1 26
 3 2017 0 1 27
 3 2018 0 1 28
 3 2019 0 1 29
 4 2017 0 1  3
 4 2018 0 1  4
 4 2019 0 1  5
 5 2010 0 0  0
 5 2011 0 0  0
 5 2012 0 0  0
 5 2013 0 0  0
 5 2014 1 1 18
 5 2015 5 1 19
 5 2016 0 1 20
 5 2017 3 1 21
 5 2018 1 1 22
 5 2019 0 1 23
 6 2015 0 0  0
 6 2016 0 1 11
 6 2017 1 1 12
 6 2018 0 1 13
 6 2019 0 1 14
 7 2004 0 0  0
 7 2005 1 0  0
 7 2006 1 0  0
 7 2007 1 0  0
 7 2008 0 0  0
 7 2009 2 0  0
 7 2010 1 1  1
 7 2011 2 1  2
 7 2012 1 1  3
 7 2013 0 1  4
 7 2014 1 1  5
 7 2015 2 1  6
 7 2016 1 1  7
 7 2017 1 1  8
 7 2018 0 1  9
 7 2019 0 1 10
 8 2009 0 0  0
 8 2010 0 0  0
 8 2011 0 0  0
 8 2012 0 0  0
 8 2013 0 0  0
 8 2014 0 0  0
 8 2015 1 1  2
 8 2016 0 1  3
 8 2017 0 1  4
 8 2018 1 1  5
 8 2019 0 1  6
 9 2006 0 0  0
 9 2007 0 0  0
 9 2008 0 0  0
 9 2009 0 0  0
 9 2010 0 0  0
 9 2011 0 0  0
 9 2012 3 0  0
 9 2013 0 1 13
 9 2014 0 1 14
 9 2015 0 1 15
 9 2016 2 1 16
 9 2017 1 1 17
 9 2018 0 1 18
 9 2019 0 1 19
10 2012 2 0  0
10 2013 1 0  0
end

[George Ford]

use robust errors to avoid the poisson assumption of equal mean/variance.

[Harmouche Abdessamie]

Thank you, Pr. George Ford

[Harmouche Abdessamie]

Thank you, Pr. George Ford