variable: i Number of obs Number of groups = = 900 150 R-sq: within = 0.1747 between = 0.4373 overall = 0.2084 Obs per group: = avg = max = 6.0 Random effects u_i ~ Gaussian corr(u_i, X) = (assumed) Wald chi2(20) Prob > chi2 INV Coef Std Err z Cashflow REVG TDTA SIZE TANGB TobinQ RISK GDP INF STATE IND1 IND2 IND3 IND4 IND7 IND6 IND8 IND9 IND10 IND11 _cons 6481295 0651994 5387535 0281394 1.216092 -.1069814 0016874 20.7167 -1.316053 -.2666654 -.0221978 -.2667082 -.0731153 -.121853 -.3034479 1668413 -.582214 0159796 -.081243 2952095 -1.59725 0503129 0859583 2391621 076389 2405378 0435648 2993753 4.333716 8750691 0916514 2604404 2354256 2738471 3397331 3205665 3754831 3272681 3362065 2781029 2473938 9792432 sigma_u sigma_e rho 1.2222536 (fraction of variance due to u_i) 12.88 0.76 2.25 0.37 5.06 -2.46 0.01 4.78 -1.50 -2.91 -0.09 -1.13 -0.27 -0.36 -0.95 0.44 -1.78 0.05 -0.29 1.19 -1.63 P>|z| 0.000 0.448 0.024 0.713 0.000 0.014 0.996 0.000 0.133 0.004 0.932 0.257 0.789 0.720 0.344 0.657 0.075 0.962 0.770 0.233 0.103 = = 231.46 0.0000 [95% Conf Interval] 5495181 -.1032758 0700044 -.1215804 7446464 -.1923669 -.5850775 12.22277 -3.031157 -.4462987 -.5326516 -.7281338 -.6098457 -.7877176 -.9317466 -.569092 -1.223648 -.6429729 -.6263146 -.1896735 -3.516531 7467409 2336747 1.007503 1778591 1.687537 -.0215959 5884522 29.21062 3990512 -.087032 4882559 1947175 463615 5440117 3248508 9027746 0592196 6749321 4638286 7800925 3220313 Kết hồi quy biến giả theo mô hình REM - Robust xtreg INV Cashflow REVG TDTA SIZE TANGB TobinQ RISK GDP INF STATE IND1- IND11,robust Random-effects GLS regression Group variable: i Number of obs Number of groups = = 900 150 R-sq: Obs per group: = avg = max = 6.0 within = 0.1747 between = 0.4373 overall = 0.2084 Random effects u_i ~ Gaussian corr(u_i, X) = (assumed) Wald chi2(20) Prob > chi2 = = 162.56 0.0000 (Std Err adjusted for 150 clusters in i) Robust Std Err INV Coef z Cashflow REVG TDTA SIZE TANGB TobinQ RISK GDP INF STATE IND1 IND2 IND3 IND4 IND7 IND6 IND8 IND9 IND10 IND11 _cons 6481295 0651994 5387535 0281394 1.216092 -.1069814 0016874 20.7167 -1.316053 -.2666654 -.0221978 -.2667082 -.0731153 -.121853 -.3034479 1668413 -.582214 0159796 -.081243 2952095 -1.59725 1728146 0773705 222411 0922513 5706966 0458644 2245109 5.960355 9655238 0795154 1850664 1803054 2210581 1874662 2304914 2119596 2762953 2006501 2421114 2019309 1.226532 sigma_u sigma_e rho 1.2222536 (fraction of variance due to u_i) 3.75 0.84 2.42 0.31 2.13 -2.33 0.01 3.48 -1.36 -3.35 -0.12 -1.48 -0.33 -0.65 -1.32 0.79 -2.11 0.08 -0.34 1.46 -1.30 P>|z| 0.000 0.399 0.015 0.760 0.033 0.020 0.994 0.001 0.173 0.001 0.905 0.139 0.741 0.516 0.188 0.431 0.035 0.937 0.737 0.144 0.193 [95% Conf Interval] 309419 -.0864439 1028359 -.1526698 0975471 -.1968739 -.4383459 9.034616 -3.208445 -.4225127 -.3849213 -.6201002 -.5063813 -.4892801 -.7552028 -.2485918 -1.123743 -.3772873 -.5557727 -.1005677 -4.001209 98684 2168427 9746712 2089485 2.334636 -.0170889 4417206 32.39878 5763393 -.110818 3405256 0866839 3601506 2455741 148307 5822745 -.0406852 4092466 3932866 6909868 8067087