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我有每家公司2004-2011年每个月度数据 现在要用前36个月数据回归,然后提取系数,该系数作为当年样本公司的一个变量 就是公司1,2007年 变量 = 公司1,2004-2006间36个月的数据的回归系数 2008年------2005-2007间36个月的数据的回归系数 以此类推 请问 stata 怎么解决 (1)按照公司滚动回归;(2)按照公司提取系数 stkcd year month a b 1 2004 1 .090482 -.01739129 1 2004 2 .116379 -.00884955 1 2004 3 .028958 -.00892856 1 2004 4 -.124765 .063063 1 2004 5 .031083 .11440688 1 2004 6 -.106029 .21335444 1 2004 7 -.056977 .06250001 1 2004 8 .006165 .06508869 1 2004 9 0 .12222224 1 2004 10 -.121324 .07028368 1 2004 11 -.016736 .10550459 1 2004 12 -.065248 .06019507 1 2005 1 -.080425 .07003894 1 2005 2 .069307 .06181821 1 2005 3 -.195988 .06484635 1 2005 4 .190019 .0288462 1 2005 5 -.030645 .03668391 1 2005 6 -.013311 .04961199 1 2005 7 0 .04851509 1 2005 8 .05059 .04312664 1 2005 9 -.075441 .05447472 1 2005 10 -.008681 .04491163 1 2005 11 .022767 .03741257 1 2005 12 .05137 .02166666 1 2006 1 .034202 .02983884 1 2006 2 .077165 .02825164 1 2006 3 -.068713 .0351967 1 2006 4 .237049 .02600002 1 2006 5 .114213 .01797656 1 2006 6 -.138952 .03984367 1 2006 7 -.111111 -.00262774 1 2006 8 .075893 -.01280296 1 2006 9 .128631 -.00382153 1 2006 10 .170343 .00011179 1 2006 11 .324607 0 1 2006 12 .143874 -.00104368 1 2007 1 .322046 0 1 2007 2 -.004182 -.00222014 1 2007 3 -.008924 .00046752 1 2007 4 .37447 .0009346 1 2007 5 .105588 .00093373 1 2007 6 .055417 0 1 2007 7 .316497 1 2007 8 .048855 1 2007 9 .052105 -.07761785 1 2007 10 .201851 -.06428303 1 2007 11 -.249116 .05201431 1 2007 12 .069845 -.08522358 1 2008 1 -.137306 -.33514934 1 2008 2 -.004505 -.01211636 1 2008 3 -.149321 -.10824705 1 2008 4 .050355 .06192709 1 2008 5 -.148211 -.03727915 1 2008 6 -.233849 .03994469 1 2008 7 .076048 .00132736 1 2008 8 -.028846 .00579733 1 2008 9 -.257921 .44217077 1 2008 10 -.271882 -.27079518 1 2008 11 .074074 -.22453471 1 2008 12 .05228 -.35810814 1 2009 1 .230444 -.16148677 1 2009 2 .185567 .03216325 1 2009 3 .155072 -.05867946 1 2009 4 .023839 -.13654523 1 2009 5 .093137 -.34829673 1 2009 6 .223094 -.08461531 1 2009 7 .199817 -.18399995 1 2009 8 -.305195 -.26361516 1 2009 9 .100055 -.14204541 1 2009 10 .123438 -.01336138 1 2009 11 .079181 -.08160343 1 2009 12 .004534 -.01840962 1 2010 1 -.109561 -.02083339 1 2010 2 .034562 .01043763 1 2010 3 .033408 .1581247 1 2010 4 -.113793 .18902228 1 2010 5 -.148346 .51854994 1 2010 6 0 -.00428938 1 2010 7 -.1490718 1 2010 8 -.33528222 1 2010 9 -.073672 -.01894454 1 2010 10 .135018 -.01617345 1 2010 11 -.109723 .05036728 1 2010 12 -.036608 -.00197762 1 2011 1 -.030399 .00528401 1 2011 2 .040496 -.00322057 1 2011 3 .009416 -.02100163 1 2011 4 .131841 -.09302325 1 2011 5 -.02967 -.07090369 1 2011 6 -.033409 -.02807434 1 2011 7 .015817 .03946292 1 2011 8 -.028258 .27216171 1 2011 9 -.048071 .13630844 1 2011 10 .052369 .13718215 1 2011 11 -.081161 .22515645 1 2011 12 .005158 .10204854 2 2004 1 .200306 -.01739129 2 2004 2 .03949 -.00884955 2 2004 3 .082108 -.00892856 2 2004 4 -.129105 .063063 2 2004 5 -.008308 .11440688 2 2004 6 -.037624 .21335444 2 2004 7 .100823 .06250001 2 2004 8 -.061682 .06508869 2 2004 9 .079681 .12222224 2 2004 10 -.077491 .07028368 2 2004 11 .024 .10550459 2 2004 12 .027344 .06019507 2 2005 1 .079848 .07003894 2 2005 2 .003521 .06181821 2 2005 3 -.031579 .06484635 2 2005 4 .068841 .0288462 2 2005 5 -.211864 .03668391 2 2005 6 .044165 .04961199 2 2005 7 .22293 .04851509 2 2005 8 -.046875 .04312664 2 2005 9 -.019126 .05447472 2 2005 10 .069638 .04491163 2 2005 11 .028646 .03741257 2 2005 12 .091139 .02166666 2 2006 1 .143852 .02983884 2 2006 2 .107505 .02825164 2 2006 3 .199634 .0351967 2 2006 4 -.048855 .02600002 2 2006 5 -.041734 .01797656 2 2006 6 -.053601 .03984367 2 2006 7 .004882 -.00262774 2 2006 8 .245487 -.01280296 2 2006 9 .097101 -.00382153 2 2006 10 .081902 .00011179 2 2006 11 .462759 0 2 2006 12 .288815 -.00104368 2 2007 1 -.00842 0 2 2007 2 -.037231 -.00222014 2 2007 3 .125509 .00046752 2 2007 4 .089813 .0009346 2 2007 5 .620586 .00093373 2 2007 6 -.014941 0 2 2007 7 .480126 -.0002426 2 2007 8 .194346 .04882921 2 2007 9 -.102578 -.07761785 2 2007 10 .289073 -.06428303 2 2007 11 -.189571 .05201431 2 2007 12 -.085895 -.08522358 2 2008 1 -.096741 -.33514934 2 2008 2 -.107486 -.01211636 2 2008 3 .101075 -.10824705 2 2008 4 -.048047 .06192709 2 2008 5 -.189577 -.03727915 2 2008 6 -.265772 .03994469 2 2008 7 -.056604 .00132736 2 2008 8 -.167059 .00579733 2 2008 9 -.077684 .44217077 2 2008 10 -.099541 -.27079518 2 2008 11 .159864 -.22453471 2 2008 12 -.054252 -.35810814 2 2009 1 .091473 -.16148677 2 2009 2 .015625 .03216325 2 2009 3 .158042 -.05867946 2 2009 4 .024155 -.13654523 2 2009 5 .148585 -.34829673 2 2009 6 .314909 -.08461531 2 2009 7 .047843 -.18399995 2 2009 8 -.296407 -.26361516 2 2009 9 .108511 -.14204541 2 2009 10 .104607 -.01336138 2 2009 11 .001738 -.08160343 2 2009 12 -.062446 -.01840962 2 2010 1 -.135985 -.02083339 2 2010 2 .009636 .01043763 2 2010 3 .007423 .1581247 2 2010 4 -.178947 .18902228 2 2010 5 -.066826 .51854994 2 2010 6 -.059639 -.00428938 2 2010 7 .222714 -.1490718 2 2010 8 .015682 -.33528222 2 2010 9 -.002375 -.01894454 2 2010 10 .154762 -.01617345 2 2010 11 -.161856 .05036728 2 2010 12 .01107 -.00197762 2 2011 1 -.002433 .00528401 2 2011 2 -.004878 -.00322057 2 2011 3 .064951 -.02100163 2 2011 4 -.024166 -.09302325 2 2011 5 -.063769 -.07090369 2 2011 6 .077806 -.02807434 2 2011 7 -.035503 .03946292 2 2011 8 0 .27216171 2 2011 9 -.111656 .13630844 2 2011 10 .104972 .13718215 2 2011 11 -.1175 .22515645 2 2011 12 .058074 .10204854
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