I am getting the error: convergence not achieved and I don't know why.
I am using this command:
Code:
local controls "fs ihs_lev rdi pcount" xtnbreg ccit cvcie1 `controls' i.fyear, fe
Code:
. local controls "fs ihs_lev rdi pcount"
.
. xtnbreg ccit cvcie1 `controls' i.fyear, fe
note: 5 groups (46 obs) dropped because of all zero outcomes
Iteration 0: log likelihood = -8277.601 (not concave)
Iteration 1: log likelihood = -3025.1813 (not concave)
Iteration 2: log likelihood = -2941.6164 (not concave)
Iteration 3: log likelihood = -2936.7774 (not concave)
Iteration 4: log likelihood = -2936.4605 (not concave)
Iteration 5: log likelihood = -2932.1437 (not concave)
Iteration 6: log likelihood = -2928.3599 (not concave)
Iteration 7: log likelihood = -2927.5556 (not concave)
Iteration 8: log likelihood = -2926.8491 (not concave)
Iteration 9: log likelihood = -1447.2455
Iteration 10: log likelihood = -1178.6375 (not concave)
Iteration 11: log likelihood = -1079.6991 (not concave)
Iteration 12: log likelihood = -1078.2154 (not concave)
Iteration 13: log likelihood = -1078.2013 (not concave)
Iteration 14: log likelihood = -1078.1848 (not concave)
Iteration 15: log likelihood = -1078.1836 (not concave)
Iteration 16: log likelihood = -1078.1834 (not concave)
Iteration 17: log likelihood = -1078.1832 (not concave)
Iteration 18: log likelihood = -1078.183 (not concave)
Iteration 19: log likelihood = -1078.1829 (not concave)
Iteration 20: log likelihood = -1078.1827 (not concave)
Iteration 21: log likelihood = -1078.1825 (not concave)
Iteration 22: log likelihood = -1078.1823 (not concave)
Iteration 23: log likelihood = -1078.1822 (not concave)
Iteration 24: log likelihood = -1078.182 (not concave)
Iteration 25: log likelihood = -1078.1818 (not concave)
Iteration 26: log likelihood = -1078.1816 (not concave)
Iteration 27: log likelihood = -1078.1814 (not concave)
Iteration 28: log likelihood = -1078.1813 (not concave)
Iteration 29: log likelihood = -1078.1811 (not concave)
Iteration 30: log likelihood = -1078.1809 (not concave)
Iteration 31: log likelihood = -1078.1807 (not concave)
Iteration 32: log likelihood = -1078.1806 (not concave)
Iteration 33: log likelihood = -1078.1804 (not concave)
Iteration 34: log likelihood = -1078.1802 (not concave)
Iteration 35: log likelihood = -1078.18 (not concave)
Iteration 36: log likelihood = -1078.1798 (not concave)
Iteration 37: log likelihood = -1078.1797 (not concave)
Iteration 38: log likelihood = -1078.1795 (not concave)
Iteration 39: log likelihood = -1078.1793 (not concave)
Iteration 40: log likelihood = -1078.1791 (not concave)
Iteration 41: log likelihood = -1078.179 (not concave)
Iteration 42: log likelihood = -1078.1788 (not concave)
Iteration 43: log likelihood = -1078.1786 (not concave)
Iteration 44: log likelihood = -1078.1784 (not concave)
Iteration 45: log likelihood = -1078.1783 (not concave)
Iteration 46: log likelihood = -1078.1781 (not concave)
Iteration 47: log likelihood = -1078.1779 (not concave)
Iteration 48: log likelihood = -1078.1777 (not concave)
Iteration 49: log likelihood = -1078.1775 (not concave)
Iteration 50: log likelihood = -1078.1774 (not concave)
Iteration 51: log likelihood = -1078.1772 (not concave)
Iteration 52: log likelihood = -1078.177 (not concave)
Iteration 53: log likelihood = -1078.1768 (not concave)
Iteration 54: log likelihood = -1078.1767 (not concave)
Iteration 55: log likelihood = -1078.1765 (not concave)
Iteration 56: log likelihood = -1078.1763 (not concave)
Iteration 57: log likelihood = -1078.1761 (not concave)
Iteration 58: log likelihood = -1078.1759 (not concave)
Iteration 59: log likelihood = -1078.1758 (not concave)
Iteration 60: log likelihood = -1078.1756 (not concave)
Iteration 61: log likelihood = -1078.1754 (not concave)
Iteration 62: log likelihood = -1078.1752 (not concave)
Iteration 63: log likelihood = -1078.1751 (not concave)
Iteration 64: log likelihood = -1078.1749 (not concave)
Iteration 65: log likelihood = -1078.1747 (not concave)
Iteration 66: log likelihood = -1078.1745 (not concave)
Iteration 67: log likelihood = -1078.1744 (not concave)
Iteration 68: log likelihood = -1078.1742 (not concave)
Iteration 69: log likelihood = -1078.174 (not concave)
Iteration 70: log likelihood = -1078.1738 (not concave)
Iteration 71: log likelihood = -1078.1737 (not concave)
Iteration 72: log likelihood = -1078.1735 (not concave)
Iteration 73: log likelihood = -1078.1733 (not concave)
Iteration 74: log likelihood = -1078.1731 (not concave)
Iteration 75: log likelihood = -1078.173 (not concave)
Iteration 76: log likelihood = -1078.1728 (not concave)
Iteration 77: log likelihood = -1078.1726 (not concave)
Iteration 78: log likelihood = -1078.1724 (not concave)
Iteration 79: log likelihood = -1078.1722 (not concave)
Iteration 80: log likelihood = -1078.1721 (not concave)
Iteration 81: log likelihood = -1078.1719 (not concave)
Iteration 82: log likelihood = -1078.1717 (not concave)
Iteration 83: log likelihood = -1078.1715 (not concave)
Iteration 84: log likelihood = -1078.1714 (not concave)
Iteration 85: log likelihood = -1078.1712 (not concave)
Iteration 86: log likelihood = -1078.171 (not concave)
Iteration 87: log likelihood = -1078.1708 (not concave)
Iteration 88: log likelihood = -1078.1707 (not concave)
Iteration 89: log likelihood = -1078.1705 (not concave)
Iteration 90: log likelihood = -1078.1703 (not concave)
Iteration 91: log likelihood = -1078.1701 (not concave)
Iteration 92: log likelihood = -1078.17 (not concave)
Iteration 93: log likelihood = -1078.1698 (not concave)
Iteration 94: log likelihood = -1078.1696 (not concave)
Iteration 95: log likelihood = -1078.1694 (not concave)
Iteration 96: log likelihood = -1078.1693 (not concave)
Iteration 97: log likelihood = -1078.1691 (not concave)
Iteration 98: log likelihood = -1078.1689 (not concave)
Iteration 99: log likelihood = -1078.1687 (not concave)
Iteration 100: log likelihood = -1078.1686 (not concave)
Iteration 101: log likelihood = -1078.1684 (not concave)
Iteration 102: log likelihood = -1078.1682 (not concave)
Iteration 103: log likelihood = -1078.168 (not concave)
Iteration 104: log likelihood = -1078.1679 (not concave)
Iteration 105: log likelihood = -1078.1677 (not concave)
Iteration 106: log likelihood = -1078.1675 (not concave)
Iteration 107: log likelihood = -1078.1673 (not concave)
Iteration 108: log likelihood = -1078.1672 (not concave)
Iteration 109: log likelihood = -1078.167 (not concave)
Iteration 110: log likelihood = -1078.1668 (not concave)
Iteration 111: log likelihood = -1078.1666 (not concave)
Iteration 112: log likelihood = -1078.1665 (not concave)
Iteration 113: log likelihood = -1078.1663 (not concave)
Iteration 114: log likelihood = -1078.1661 (not concave)
Iteration 115: log likelihood = -1078.1659 (not concave)
Iteration 116: log likelihood = -1078.1658 (not concave)
Iteration 117: log likelihood = -1078.1656 (not concave)
Iteration 118: log likelihood = -1078.1654 (not concave)
Iteration 119: log likelihood = -1078.1652 (not concave)
Iteration 120: log likelihood = -1078.1651 (not concave)
Iteration 121: log likelihood = -1078.1649 (not concave)
Iteration 122: log likelihood = -1078.1647 (not concave)
Iteration 123: log likelihood = -1078.1645 (not concave)
Iteration 124: log likelihood = -1078.1644 (not concave)
Iteration 125: log likelihood = -1078.1642 (not concave)
Iteration 126: log likelihood = -1078.164 (not concave)
Iteration 127: log likelihood = -1078.1638 (not concave)
Iteration 128: log likelihood = -1078.1637 (not concave)
Iteration 129: log likelihood = -1078.1635 (not concave)
Iteration 130: log likelihood = -1078.1633 (not concave)
Iteration 131: log likelihood = -1078.1631 (not concave)
Iteration 132: log likelihood = -1078.163 (not concave)
Iteration 133: log likelihood = -1078.1628 (not concave)
Iteration 134: log likelihood = -1078.1626 (not concave)
Iteration 135: log likelihood = -1078.1624 (not concave)
Iteration 136: log likelihood = -1078.1623 (not concave)
Iteration 137: log likelihood = -1078.1621 (not concave)
Iteration 138: log likelihood = -1078.1619 (not concave)
Iteration 139: log likelihood = -1078.1617 (not concave)
Iteration 140: log likelihood = -1078.1616 (not concave)
Iteration 141: log likelihood = -1078.1614 (not concave)
Iteration 142: log likelihood = -1078.1612 (not concave)
Iteration 143: log likelihood = -1078.161 (not concave)
Iteration 144: log likelihood = -1078.1609 (not concave)
Iteration 145: log likelihood = -1078.1607 (not concave)
Iteration 146: log likelihood = -1078.1605 (not concave)
Iteration 147: log likelihood = -1078.1603 (not concave)
Iteration 148: log likelihood = -1078.1602 (not concave)
Iteration 149: log likelihood = -1078.16 (not concave)
Iteration 150: log likelihood = -1078.1598 (not concave)
Iteration 151: log likelihood = -1078.1597 (not concave)
Iteration 152: log likelihood = -1078.1595 (not concave)
Iteration 153: log likelihood = -1078.1593 (not concave)
Iteration 154: log likelihood = -1078.1591 (not concave)
Iteration 155: log likelihood = -1078.159 (not concave)
Iteration 156: log likelihood = -1078.1588 (not concave)
Iteration 157: log likelihood = -1078.1586 (not concave)
Iteration 158: log likelihood = -1078.1584 (not concave)
Iteration 159: log likelihood = -1078.1583 (not concave)
Iteration 160: log likelihood = -1078.1581 (not concave)
Iteration 161: log likelihood = -1078.1579 (not concave)
Iteration 162: log likelihood = -1078.1577 (not concave)
Iteration 163: log likelihood = -1078.1576 (not concave)
Iteration 164: log likelihood = -1078.1574 (not concave)
Iteration 165: log likelihood = -1078.1572 (not concave)
Iteration 166: log likelihood = -1078.1571 (not concave)
Iteration 167: log likelihood = -1078.1569 (not concave)
Iteration 168: log likelihood = -1078.1567 (not concave)
Iteration 169: log likelihood = -1078.1565 (not concave)
Iteration 170: log likelihood = -1078.1564 (not concave)
Iteration 171: log likelihood = -1078.1562 (not concave)
Iteration 172: log likelihood = -1078.156 (not concave)
Iteration 173: log likelihood = -1078.1558 (not concave)
Iteration 174: log likelihood = -1078.1557 (not concave)
Iteration 175: log likelihood = -1078.1555 (not concave)
Iteration 176: log likelihood = -1078.1553 (not concave)
Iteration 177: log likelihood = -1078.1551 (not concave)
Iteration 178: log likelihood = -1078.155 (not concave)
Iteration 179: log likelihood = -1078.1548 (not concave)
Iteration 180: log likelihood = -1078.1546 (not concave)
Iteration 181: log likelihood = -1078.1545 (not concave)
Iteration 182: log likelihood = -1078.1543 (not concave)
Iteration 183: log likelihood = -1078.1541 (not concave)
Iteration 184: log likelihood = -1078.1539 (not concave)
Iteration 185: log likelihood = -1078.1538 (not concave)
Iteration 186: log likelihood = -1078.1536 (not concave)
Iteration 187: log likelihood = -1078.1534 (not concave)
Iteration 188: log likelihood = -1078.1532 (not concave)
Iteration 189: log likelihood = -1078.1531 (not concave)
Iteration 190: log likelihood = -1078.1529 (not concave)
Iteration 191: log likelihood = -1078.1527 (not concave)
Iteration 192: log likelihood = -1078.1526 (not concave)
Iteration 193: log likelihood = -1078.1524 (not concave)
Iteration 194: log likelihood = -1078.1522 (not concave)
Iteration 195: log likelihood = -1078.152 (not concave)
Iteration 196: log likelihood = -1078.1519 (not concave)
Iteration 197: log likelihood = -1078.1517 (not concave)
Iteration 198: log likelihood = -1078.1515 (not concave)
Iteration 199: log likelihood = -1078.1513 (not concave)
Iteration 200: log likelihood = -1078.1512 (not concave)
Iteration 201: log likelihood = -1078.151 (not concave)
Iteration 202: log likelihood = -1078.1508 (not concave)
Iteration 203: log likelihood = -1078.1507 (not concave)
Iteration 204: log likelihood = -1078.1505 (not concave)
Iteration 205: log likelihood = -1078.1503 (not concave)
Iteration 206: log likelihood = -1078.1501 (not concave)
Iteration 207: log likelihood = -1078.15 (not concave)
Iteration 208: log likelihood = -1078.1498 (not concave)
Iteration 209: log likelihood = -1078.1496 (not concave)
Iteration 210: log likelihood = -1078.1495 (not concave)
Iteration 211: log likelihood = -1078.1493 (not concave)
Iteration 212: log likelihood = -1078.1491 (not concave)
Iteration 213: log likelihood = -1078.1489 (not concave)
Iteration 214: log likelihood = -1078.1488 (not concave)
Iteration 215: log likelihood = -1078.1486 (not concave)
Iteration 216: log likelihood = -1078.1484 (not concave)
Iteration 217: log likelihood = -1078.1483 (not concave)
Iteration 218: log likelihood = -1078.1481 (not concave)
Iteration 219: log likelihood = -1078.1479 (not concave)
Iteration 220: log likelihood = -1078.1477 (not concave)
Iteration 221: log likelihood = -1078.1476 (not concave)
Iteration 222: log likelihood = -1078.1474 (not concave)
Iteration 223: log likelihood = -1078.1472 (not concave)
Iteration 224: log likelihood = -1078.1471 (not concave)
Iteration 225: log likelihood = -1078.1469 (not concave)
Iteration 226: log likelihood = -1078.1467 (not concave)
Iteration 227: log likelihood = -1078.1465 (not concave)
Iteration 228: log likelihood = -1078.1464 (not concave)
Iteration 229: log likelihood = -1078.1462 (not concave)
Iteration 230: log likelihood = -1078.146 (not concave)
Iteration 231: log likelihood = -1078.1459 (not concave)
Iteration 232: log likelihood = -1078.1457 (not concave)
Iteration 233: log likelihood = -1078.1455 (not concave)
Iteration 234: log likelihood = -1078.1453 (not concave)
Iteration 235: log likelihood = -1078.1452 (not concave)
Iteration 236: log likelihood = -1078.145 (not concave)
Iteration 237: log likelihood = -1078.1448 (not concave)
Iteration 238: log likelihood = -1078.1447 (not concave)
Iteration 239: log likelihood = -1078.1445 (not concave)
Iteration 240: log likelihood = -1078.1443 (not concave)
Iteration 241: log likelihood = -1078.1441 (not concave)
Iteration 242: log likelihood = -1078.144 (not concave)
Iteration 243: log likelihood = -1078.1438 (not concave)
Iteration 244: log likelihood = -1078.1436 (not concave)
Iteration 245: log likelihood = -1078.1435 (not concave)
Iteration 246: log likelihood = -1078.1433 (not concave)
Iteration 247: log likelihood = -1078.1431 (not concave)
Iteration 248: log likelihood = -1078.1429 (not concave)
Iteration 249: log likelihood = -1078.1428 (not concave)
Iteration 250: log likelihood = -1078.1426 (not concave)
Iteration 251: log likelihood = -1078.1424 (not concave)
Iteration 252: log likelihood = -1078.1423 (not concave)
Iteration 253: log likelihood = -1078.1421 (not concave)
Iteration 254: log likelihood = -1078.1419 (not concave)
Iteration 255: log likelihood = -1078.1417 (not concave)
Iteration 256: log likelihood = -1078.1416 (not concave)
Iteration 257: log likelihood = -1078.1414 (not concave)
Iteration 258: log likelihood = -1078.1412 (not concave)
Iteration 259: log likelihood = -1078.1411 (not concave)
Iteration 260: log likelihood = -1078.1409 (not concave)
Iteration 261: log likelihood = -1078.1407 (not concave)
Iteration 262: log likelihood = -1078.1406 (not concave)
Iteration 263: log likelihood = -1078.1404 (not concave)
Iteration 264: log likelihood = -1078.1402 (not concave)
Iteration 265: log likelihood = -1078.14 (not concave)
Iteration 266: log likelihood = -1078.1399 (not concave)
Iteration 267: log likelihood = -1078.1397 (not concave)
Iteration 268: log likelihood = -1078.1395 (not concave)
Iteration 269: log likelihood = -1078.1394 (not concave)
Iteration 270: log likelihood = -1078.1392 (not concave)
Iteration 271: log likelihood = -1078.139 (not concave)
Iteration 272: log likelihood = -1078.1388 (not concave)
Iteration 273: log likelihood = -1078.1387 (not concave)
Iteration 274: log likelihood = -1078.1385 (not concave)
Iteration 275: log likelihood = -1078.1383 (not concave)
Iteration 276: log likelihood = -1078.1382 (not concave)
Iteration 277: log likelihood = -1078.138 (not concave)
Iteration 278: log likelihood = -1078.1378 (not concave)
Iteration 279: log likelihood = -1078.1377 (not concave)
Iteration 280: log likelihood = -1078.1375 (not concave)
Iteration 281: log likelihood = -1078.1373 (not concave)
Iteration 282: log likelihood = -1078.1371 (not concave)
Iteration 283: log likelihood = -1078.137 (not concave)
Iteration 284: log likelihood = -1078.1368 (not concave)
Iteration 285: log likelihood = -1078.1366 (not concave)
Iteration 286: log likelihood = -1078.1365 (not concave)
Iteration 287: log likelihood = -1078.1363 (not concave)
Iteration 288: log likelihood = -1078.1361 (not concave)
Iteration 289: log likelihood = -1078.136 (not concave)
Iteration 290: log likelihood = -1078.1358 (not concave)
Iteration 291: log likelihood = -1078.1356 (not concave)
Iteration 292: log likelihood = -1078.1355 (not concave)
Iteration 293: log likelihood = -1078.1353 (not concave)
Iteration 294: log likelihood = -1078.1351 (not concave)
Iteration 295: log likelihood = -1078.1349 (not concave)
Iteration 296: log likelihood = -1078.1348 (not concave)
Iteration 297: log likelihood = -1078.1346 (not concave)
Iteration 298: log likelihood = -1078.1344 (not concave)
Iteration 299: log likelihood = -1078.1343 (not concave)
Iteration 300: log likelihood = -1078.1341 (not concave)
convergence not achieved
Conditional FE negative binomial regression Number of obs = 309
Group variable: gvkey Number of groups = 29
Obs per group:
min = 7
avg = 10.7
max = 11
Wald chi2(14) = .
Log likelihood = -1078.1341 Prob > chi2 = .
------------------------------------------------------------------------------
ccit | Coefficient Std. err. z P>|z| [95% conf. interval]
-------------+----------------------------------------------------------------
cvcie1 | 8.12e-09 3.26e-09 2.49 0.013 1.73e-09 1.45e-08
fs | -.0315867 .0828908 -0.38 0.703 -.1940498 .1308763
ihs_lev | -1.036429 .1918913 -5.40 0.000 -1.412529 -.6603292
rdi | -2.303226 1.817969 -1.27 0.205 -5.86638 1.259928
pcount | .001566 .0002635 5.94 0.000 .0010496 .0020825
|
fyear |
2010 | -1.116491 .2103392 -5.31 0.000 -1.528748 -.7042336
2011 | -1.504335 . . . . .
2012 | -1.557152 .2233488 -6.97 0.000 -1.994908 -1.119397
2013 | -1.860322 .2126817 -8.75 0.000 -2.27717 -1.443473
2014 | -1.916959 .2182443 -8.78 0.000 -2.34471 -1.489208
2015 | -1.76991 .1889673 -9.37 0.000 -2.140279 -1.39954
2016 | -1.84402 .1852485 -9.95 0.000 -2.2071 -1.480939
2017 | -3.255445 .3514149 -9.26 0.000 -3.944205 -2.566684
2018 | -4.21537 .5266363 -8.00 0.000 -5.247558 -3.183182
2019 | -3.860314 .4762395 -8.11 0.000 -4.793726 -2.926902
|
_cons | 2.105214 .8609846 2.45 0.014 .4177149 3.792712
------------------------------------------------------------------------------
convergence not achieved
r(430);
end of do-fileI am getting this error only by adding "pcount" to my controls.
But it makes sense to test for it in my analysis.
I hope you can help me
Thank you
Kind regards,
Jana
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