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Re:st: sorting variables into quartiles and table of data


From   "west--\@libero\.it" <west--@libero.it>
To   "statalist" <statalist@hsphsun2.harvard.edu>
Subject   Re:st: sorting variables into quartiles and table of data
Date   Sat, 4 Nov 2006 10:21:20 +0100

I need to clarify a statement better my query. Every firm year data on leverage should be related to each quartile of human-capital intensity proxy for that year, so that a single firm'leverage could be put in a different quartile year after year (from 1980 to 1990), according to the human capital value. The resulting table woud be, in other words, a "double" mean (and a median) measured both between the firms of that quartile and over time. Sorry for this new message, but I hope you may help me. Thanks.



> Dear all,
> 
> I need to replicate a univariate analysis: the database is made up of 250 firms, from 1980 to 1990 (but there are somewhere firm-year missing data). I would to present an univariate comparisons of firmís leverage by quartiles of human-capital intensity proxies. I am interested to know if human-capital intensive firms, such as the firms in the fourth quartile, differ in leverage level from those
> firms that are not human-capital intensive, such as the firms in the first quartile. The analysys test the hypothesis that leverage levels differ between firms in the fourth quartile and firms in the first quartile with a t-test.
> The table below displays the mean (and median values in the parentheses) leverage ratios ("mlev" e "lev") in each quartile of human-capital intensity proxies (one measure for panel 1, called "human capital_1", one for panel 2 called "human capital_2"). In the last column, the difference of the mean value between the fourth quartile and first quartile is calculated and the t-statistic is shown in the parenthesis beneath. Could somebody help me to repeat this calculations and also to reproduce this table?
> It would be very important for me. Thank you in advance.
> 
> -------------------------------
> Table
> 
> panel 1 (human capital_1)					
> 	1Q	2Q	3Q	4Q	diff
> mlev	4.2	7.5	10.4	17.5	13.3
> 	(-4.4)	(-7.4)	(-10.3)	(-15.0)	(-46.2)
> lev	0.2	0.2	0.2	0.2	-0.03
> 	(-0.1)	(-0.1)	(-0.1)	(-0.1)	(-2.8)
> 					
> panel 2	(human capital_2)				
> 	1Q	2Q	3Q	4Q	diff
> mlev	1.5	2.2	2.9	4.7	3.2
> 	(-1.5)	-2.2	-2.8	-4.0	-33.6
> lev	0.2	0.2	0.2	0.2	-0.03
> 	(-0.2)	(-0.1)	(-0.1)	(-0.1)	(-1.2)
> 
> 
> Luca Romano
> Milan (Italy)
> 
> 
> 
> ------------------------------------------------------
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------------------------------------------------------
BANCA MEDIOLANUM cerca Family Banker. Invia il CV a www.familybanker.it
http://click.libero.it/mediolanum4nov



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