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yael
‎02-12-2019
  • 75 Posts
  • 46 Likes Given
  • 0 Solutions
  • 2 Likes Received

Re: Change during years

by Quartz | Level 8 in SAS Procedures
‎04-26-2017 08:46 AM
‎04-26-2017 08:46 AM
Thanks, I do not know this procedure, I will check it! ... View more

Change during years

by Quartz | Level 8 in SAS Procedures
‎04-26-2017 04:17 AM
‎04-26-2017 04:17 AM
Hello   I am looking for idea,   I have details of 2 groups of firms (A and B). Each firm can be in 1 out of 5 stages, while stage 4,5 represnt decline performace and 2,3 represnt better performance. I want to check if firm A recovers (from decline performance to better performace) faster than firm B. Any idea how to do it (I do not think that avearge observation in each stage is enough).   Thanks a lot for any help!     ... View more

Dummy variable

by Quartz | Level 8 in Statistical Procedures
‎04-20-2017 07:02 AM
‎04-20-2017 07:02 AM
Hello   I am asking for your advice,   I have 3 dummy variables with 1/0. These are called :Afirm ,Bfirm ,Cfirm. I also have a variable called FIRMS that have 3 options:1,2,3. When Afirm=1 than FIRMS=1, When bfirm=1 than FIRMS=2, When cfirm=1 than FIRMS=3.   If I run a regression, I understand the meaning of the coeffient of Afirm ,Bfirm ,Cfirm. But is it any meaning for the variable FIRMS? What is preferable to add in the regression in order to get the difference between the firms?   Thanks for your help!     ... View more

Re: Independent variables

by Quartz | Level 8 in Statistical Procedures
‎04-19-2017 02:37 AM
‎04-19-2017 02:37 AM
Thanks for your answer But my question is what is the difference between the two options I mentioned? ... View more

Independent variables

by Quartz | Level 8 in Statistical Procedures
‎04-19-2017 02:23 AM
‎04-19-2017 02:23 AM
Hello,   I need your advice,   I have 3 groups in my research: Firms that founded on 1930 (FF - dummy variable), Firms that founded on 1970 (FNF - dummy variable), and other firms. I also have the continous variables that describe the largest ownership in the relevant firm, FOWN for FF firm and FNFOWN for FNF firms. If I want to check the ownership impact on performance, should I run regression as: proc reg data=sasuser.sasfile; model performance = FOWN FNFOWN ; run;   Or should I create a new variable named, for example, OWN, that reflect that largest owners in each firm but the code will be: proc reg data=sasuser.sasfile; model performance = OWN*FF OWN*FNF ; (I will create a new variable for each duplicated variables) run;   Thanks for your help!!!! ... View more

Adding text

by Quartz | Level 8 in Statistical Procedures
‎04-18-2017 07:47 AM
‎04-18-2017 07:47 AM
Hi   I need your help as I want to add text to my sas code, text that I can see in the output. As far as I understand, I should use /*text*/, I did it but it does not shown in the output   What is my mistake?   Thanks a lot! ... View more

Compare between groups

by Quartz | Level 8 in Statistical Procedures
‎04-18-2017 02:20 AM
‎04-18-2017 02:20 AM
Hello,   I need your help in comparing between groups.   I have 3 groups:   Firms that were founded on 1930 (dummy variable FF with 1 for the relevant firm) Firms that were founded on 1970 (dummy variable FNF with 1 for the relevant firm) Other firms   The dependent variables is ROA and the code is:   proc reg data=sasuser.sasfile010916; model roa = ff fnf Lnsalesgro lnassets RDAssets; run;   If, for example, the coefficient of FF is 0.08 (significant) and for FNF is 0.01 (significant). That means that firms that were founded on 1930 have higher rate in 8% in ROA in relate to the 2 other groups?   Thanks for your help, it always great!   Yael     ... View more

22-322: Syntax error

by Quartz | Level 8 in Statistical Procedures
‎04-06-2017 05:16 AM
‎04-06-2017 05:16 AM
Hello,   I run the following code: proc reg data=sasuser.sasfile; model roa1 = ff ff*introduc2 ff*growth2 ff*maturing2 ff*shake2c Lnsalesgro; run;   Where ff, introduc2, growth2, maturing2, shake2c are dummy variables and Lnsalesgro and ROA1 is countinous variables. I got the following log:   323 model roa1 = ff ff*introduc2 ff*growth2 ff*maturing2 ff*shake2c Lnsalesgro - 22 76 ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, /, :, _ALL_, _CHARACTER_, _CHAR_, _NUMERIC_, {. ERROR 76-322: Syntax error, statement will be ignored.   What is my mistake?   Thanks a lot!     ... View more

Re: Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎04-03-2017 02:27 AM
‎04-03-2017 02:27 AM
Dear @PaigeMiller, I understand that I should use PROC GLM instead of TTEST because of the error terms (if I compare more than 2 groups). I really want to understand it deeply. Can you recommand what is the specific subject that I have to look for in order to get more understanding about it? Thanks ... View more

Re: Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-31-2017 09:00 AM
‎03-31-2017 09:00 AM
@PaigeMiller Thanks for your fast reply and shabat shalom ... View more

Re: Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-31-2017 08:24 AM
‎03-31-2017 08:24 AM
Dear @PaigeMiller I wonder if you can help me with the contrast statement, I want to compare between stage 2 to stage 1,3,4,5 together, The code is: proc glm data=sasuser.sasfile010916; class stage; model ROA1=stage; means stage/deponly; contrast 'Compare 2 vs 1,3,4,5 together' stage 1 1 -4 1 1; run;   Am I right? ... View more

Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-30-2017 04:04 AM
‎03-30-2017 04:04 AM
Hello,   I am tring to understand the results I got.    My code is: proc ttest data=sasuser.sasfile010916; class stage; format stage firstgroup.; var ROA1 ROA2 ROA3 ROA4 ROE1 ROE2 ROIC Q LNQ ; run;   I copmare between the mean of group 1 to the mean of the other 3 groups mean together. The result I got for the variable ROA1: T value = 0.06 Pr = 0.94 while F value is 2.77 pr<0.0001 According to the t value, I understand that there is not difference between group 1 to the other 3 groups together. But what is the meaning of the F value here?   Thanks for any clue...   Yael   ... View more

Re: Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-30-2017 01:58 AM
‎03-30-2017 01:58 AM
@ballardw Thanks for your answer. You meant to format stage firstgroup and not format state firstgroup, right? ... View more

Re: Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-29-2017 10:17 AM
‎03-29-2017 10:17 AM
@PaigeMiller - thanks for your answer!   But if I want to test it with proc ttest, I want to compare between 1 group in relate to ALL 3 OTHER GROUPS TOGETHER. So, what is wrong with my following code:   proc ttest data=sasuser.sasfile010916; where stage=1; var ROA1 ROA2 ROA3 ROA4 ROE1 ROE2 ROIC Q LNQ ; run;   Remarks - the groups are in variable STAGE that has the values - 1,2,3,4. How can I relate to groups 2-4 together (as 1 group)?   Thanks  ... View more

Comparing means between several groups

by Quartz | Level 8 in Statistical Procedures
‎03-29-2017 08:40 AM
‎03-29-2017 08:40 AM
Hello,   I asking for your help.   I have 3 variables that divided to 4 groups (Quantitative variables). I intend to check if there is any difference between the groups for each variable.   My difficulty in using ANOVA - it indicates that one of the group is different but it does not indicate which one of the group is different.   Can you please advise what king of test to use in order to get indication which group is different in relate to the other. Should I use TTEST in the following way: checking one group in relate to the other 3 groups together (=as another one group)?   I hope my question is clear...   Thanks a lot! ... View more
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‎02-12-2019 09:09 AM
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