- egen daf=group(firmid)
- xtset daf year
- xtnbreg firmNum tfp exp age i.year ,fe
- xtnbreg firmNum tfp exp age i.year ,re
- nbreg firmNum tfp exp age i.year cic4,r nolog difficult
部分数据如下所示
- clear
- input int firmNum str10 firmid float year int age float expinten int cic4 float tfp
- 1 "3713960402" 2007 8 0 2643 1.8726715
- 1 "4403131743" 2003 19 1 4043 3.5011976
- 1 "3119940070" 2008 17 .6035028 4043 2.498123
- 1 "3701910858" 2006 51 .10787103 3544 1.350484
- 1 "3720910166" 2005 35 .0410808 3230 1.9161437
- 1 "3203960166" 2004 1 .3719474 1722 .5926956
- 1 "3702249759" 2005 4 .033108007 3954 1.1292802
- 1 "3205240350" 2008 7 .9862022 3921 .
- 1 "3311930175" 2004 12 .5924495 3482 1.4598887
- 1 "2101911507" 2008 4 0 3725 4.913646
- 1 "4405141161" 2008 15 .4534292 3152 2.736627
- 1 "4420944304" 2007 13 .08450302 3530 3.7712514
- 1 "4401923133" 2000 9 .4750388 4260 .3025835
- 1 "3118930369" 2003 4 .7107127 3090 .19495225
- 1 "4101931172" 2004 12 .009818167 3721 1.569183
- 1 "3311962294" 2005 8 .067031145 3952 .4730142
- 1 "4215911013" 2004 9 .06410257 2920 .4261812
- 1 "3320950352" 2005 13 .7291654 3731 1.7543038
- 1 "3301930769" 2004 12 .005777623 2311 .6296975
- 1 "4403163837" 2004 4 .8477874 4039 1.4999024
- 1 "3206964058" 2006 6 .3041511 1351 1.4509985
- 1 "3302950050" 2003 9 .5523046 3529 .4971354
- 1 "4403162739" 2005 13 .3937298 3725 1.3504524
- 1 "3205942434" 2006 4 .4602908 3672 .3355467
- 1 "1207240188" 2006 9 .8938636 2710 .
- 1 "1108310320" 2008 12 .2395437 3552 4.1525016
- 1 "3702961103" 2007 9 .08152027 1370 1.6090382
- 1 "3315960100" 2005 8 .08595744 3451 1.347958
- 1 "4423940792" 2006 8 .8432964 3592 .9135461
- 1 "4204910025" 2000 43 .032744676 3542 .9082215
- 1 "4419941036" 2000 4 .6856459 2190 .21498844
- 1 "2101911022" 2003 67 .029510874 3663 .13218309
- 1 "5013960332" 2007 16 .402028 3732 1.2708007
- 1 "3303966014" 2005 10 .1536684 4061 1.1088117
- 1 "4403918005" 2002 19 .7744694 4160 1.3772595
- 1 "3312950015" 2001 17 .18007496 4073 1.1760871
- 1 "3204910339" 2004 44 .04162695 3613 1.400681
- 1 "4422930808" 2000 6 .4159435 3487 .56796366
- 1 "5101933522" 2006 4 0 3411 2.5793645
- 1 "4407942183" 2002 3 0 3483 .736103
- 1 "4207930139" 2005 3 .9576342 2710 -.26460403
- 1 "3120930277" 2002 3 0 3732 .
- 1 "3202945806" 2005 12 .6378401 3631 1.4061296
- 1 "4401240232" 2004 3 .00026564728 4059 3.3313525
- 1 "3205240271" 2004 4 .034365475 3953 .931609
- 1 "3316910002" 2000 36 .22166742 3649 1.1252263
- 1 "4420932784" 2007 6 .8465515 3577 1.7575016
- 1 "3402930154" 2007 5 0 3725 .8717861
- 1 "4403130368" 2002 12 1 4219 .
- 1 "4403136464" 2001 3 .8063009 4160 1.6850787
- 1 "3306967209" 2004 5 0 3721 -.1632292
- 1 "3701961558" 2004 8 .05943169 2720 1.6555905
- 1 "4403962788" 2008 7 .1223317 4043 1.8513986
- 1 "3211912018" 2005 14 .6822054 3552 1.0788188
- 1 "1306932219" 2008 19 .03627726 2422 1.8458344
- 1 "4422920403" 2000 6 .5830306 4069 .7897458
- 1 "3118941022" 2007 4 .14605348 3191 1.6566333
- 1 "3317960094" 2008 1 .666579 3971 .
- 1 "3222961171" 2008 27 .12473685 3691 .
- 1 "1302910138" 2007 7 0 1540 .25913382
- 1 "3321940027" 2003 9 .9177154 3424 1.9687473
- 1 "3110955012" 2004 49 .8823608 1810 .21504766
- 1 "1306960581" 2006 2 .2750782 3721 .53245103
- 1 "1308910012" 2000 52 .00363879 3531 .25446016
- 1 "3715961467" 2008 12 .05968173 3924 1.1639538
- 1 "4403940084" 2000 9 1 4064 1.9312238
- 1 "3204963109" 2007 15 .09164713 3147 2.2074919
- 1 "3120920056" 2007 15 0 3040 -.23574005
- end


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