topic Re: how to indicate dummy variable within a group? in Statistical Procedures

how to indicate dummy variable within a group?

sfan6 — Sun, 22 Sep 2019 14:42:21 GMT

Hello everyone, I am writing research project and I have the data set，

Year company_ID Board_Director_ID Financial_Expert Independent_Board

2007 001 AAA Yes No

2007 001 BBB No Yes

2007 001 CCC No No

2007 001 DDD No No

2008 002 EEE No No

2008 002 FFF Yes No

2008 002 GGG No No

2009 001 AAA Yes No

2009 001 BBB No Yes

2009 001 CCC No No

2009 001 DDD No No

I need to transform into firm-year obs, and the expected result would be

Year company_ID Financial_Expert Independent_Board

2007 001 1(Yes) 1 (Yes)

2008 002 1 0

2009 001 1 1

I very appreciate your help!

Re: how to indicate dummy variable within a group?

novinosrin — Sun, 22 Sep 2019 14:56:51 GMT

data have;
input Year (company_ID Board_Director_ID  Financial_Expert          Independent_Board ) (:$10.);
cards;
2007          001                               AAA                          Yes                                    No
2007          001                               BBB                          No                                    Yes
2007          001                              CCC                          No                                     No
2007          001                              DDD                          No                                     No
2008          002                              EEE                           No                                     No 
2008          002                              FFF                           Yes                                    No 
2008          002                             GGG                          No                                     No 
2009          001                             AAA                            Yes                                    No
2009          001                             BBB                            No                                    Yes
2009          001                            CCC                            No                                     No
2009          001                             DDD                           No                                     No
;

proc sql;
create table want as
select year,company_ID,max(Financial_Expert="Yes") as Financial_Expert,max(Independent_Board="Yes") as Independent_Board
from have
group by Year,company_ID;
quit;