Iteration log likelihood (not concave) takes longer time to run xtfrontier for profit efficiency

[Tarekegn Tariku Ebissa]

I was trying to run xtfrontier lnprofit lnpriceoflabor priceoffund lncostperloan lnnetloanportfo lnloanratio laborprice2 priceoffund2 lncostperloan2 lnnetloanportfo2 lnloanratio2 labornetport laborloanratio fundnetloanport fundloanratio loannetloanport loanloanratio t2 timelabor timefund timecostperloan timenetport timeloanratio, ti
on STATA 14 to estimate profit efficiency.
However, it is taking me too longer time to estimate the log likelihood outcomes as a result I could not get the estimated efficiency parameters for my profit function. How can I solve the problem? Thanks

[Tarekegn Tariku Ebissa]

Iteration 0: log likelihood = -772.73375 (not concave)
Iteration 1: log likelihood = -764.6744
Iteration 2: log likelihood = -732.46721
Iteration 3: log likelihood = -706.96063
Iteration 4: log likelihood = -697.33826
Iteration 5: log likelihood = -691.6674
Iteration 6: log likelihood = -688.24561
Iteration 7: log likelihood = -686.15706
Iteration 8: log likelihood = -684.985
Iteration 9: log likelihood = -684.10127
Iteration 10: log likelihood = -683.59687
Iteration 11: log likelihood = -683.28314
Iteration 12: log likelihood = -683.10848
Iteration 13: log likelihood = -682.90461 (not concave)
Iteration 14: log likelihood = -682.8545
Iteration 15: log likelihood = -682.80492
Iteration 16: log likelihood = -682.78966 (not concave)
Iteration 17: log likelihood = -682.78758 (not concave)
Iteration 18: log likelihood = -682.78749 (not concave)
Iteration 19: log likelihood = -682.78748 (not concave)
Iteration 20: log likelihood = -682.78747 (not concave)
Iteration 21: log likelihood = -682.78746 (not concave)
Iteration 22: log likelihood = -682.78744 (not concave)
Iteration 23: log likelihood = -682.78744 (not concave)
Iteration 24: log likelihood = -682.78743 (not concave)
Iteration 25: log likelihood = -682.78743 (not concave)
Iteration 26: log likelihood = -682.78742 (not concave)
Iteration 27: log likelihood = -682.78742 (not concave)
Iteration 28: log likelihood = -682.78742 (not concave)
Iteration 29: log likelihood = -682.78741 (not concave)
Iteration 30: log likelihood = -682.78741 (not concave)
Iteration 31: log likelihood = -682.78741 (not concave)
Iteration 32: log likelihood = -682.7874 (not concave)
Iteration 33: log likelihood = -682.7874 (not concave)
Iteration 34: log likelihood = -682.7874 (not concave)
Iteration 35: log likelihood = -682.7874 (not concave)
Iteration 36: log likelihood = -682.78739 (not concave)
Iteration 37: log likelihood = -682.78739 (not concave)
Iteration 38: log likelihood = -682.78739 (not concave)
Iteration 39: log likelihood = -682.78739 (not concave)
Iteration 40: log likelihood = -682.78738 (not concave)
Iteration 41: log likelihood = -682.78738 (not concave)
Iteration 42: log likelihood = -682.78738 (not concave)
Iteration 43: log likelihood = -682.78738 (not concave)
Iteration 44: log likelihood = -682.78738 (not concave)
Iteration 45: log likelihood = -682.78737 (not concave)
Iteration 46: log likelihood = -682.78737 (not concave)
Iteration 47: log likelihood = -682.78737 (not concave)
Iteration 48: log likelihood = -682.78737 (not concave)
Iteration 49: log likelihood = -682.78736 (not concave)
Iteration 50: log likelihood = -682.78736 (not concave)
Iteration 51: log likelihood = -682.78736 (not concave)
Iteration 52: log likelihood = -682.78736 (not concave)
Iteration 53: log likelihood = -682.78736 (not concave)
Iteration 54: log likelihood = -682.78736 (not concave)
Iteration 55: log likelihood = -682.78735 (not concave)
Iteration 56: log likelihood = -682.78735 (not concave)
Iteration 57: log likelihood = -682.78735 (not concave)
Iteration 58: log likelihood = -682.78735 (not concave)
Iteration 59: log likelihood = -682.78735 (not concave)
Iteration 60: log likelihood = -682.78735 (not concave)
Iteration 61: log likelihood = -682.78734 (not concave)
Iteration 62: log likelihood = -682.78734 (not concave)
Iteration 63: log likelihood = -682.78734 (not concave)
Iteration 64: log likelihood = -682.78734 (not concave)
Iteration 65: log likelihood = -682.78734 (not concave)
Iteration 66: log likelihood = -682.78734 (not concave)
Iteration 67: log likelihood = -682.78733 (not concave)
Iteration 68: log likelihood = -682.78733 (not concave)
Iteration 69: log likelihood = -682.78733 (not concave)
Iteration 70: log likelihood = -682.78733 (not concave)
Iteration 71: log likelihood = -682.78733 (not concave)
Iteration 72: log likelihood = -682.78733 (not concave)
Iteration 73: log likelihood = -682.78733 (not concave)
Iteration 74: log likelihood = -682.78732 (not concave)
Iteration 75: log likelihood = -682.78732 (not concave)
Iteration 76: log likelihood = -682.78732 (not concave)
Iteration 77: log likelihood = -682.78732 (not concave)
Iteration 78: log likelihood = -682.78732 (not concave)
Iteration 79: log likelihood = -682.78732 (not concave)
Iteration 80: log likelihood = -682.78732 (not concave)
Iteration 81: log likelihood = -682.78732 (not concave)
Iteration 82: log likelihood = -682.78731 (not concave)
Iteration 83: log likelihood = -682.78731 (not concave)
Iteration 84: log likelihood = -682.78731 (not concave)
Iteration 85: log likelihood = -682.78731 (not concave)
Iteration 86: log likelihood = -682.78731 (not concave)
Iteration 87: log likelihood = -682.78731 (not concave)
Iteration 88: log likelihood = -682.78731 (not concave)
Iteration 89: log likelihood = -682.7873 (not concave)
Iteration 90: log likelihood = -682.7873 (not concave)
Iteration 91: log likelihood = -682.7873 (not concave)
Iteration 92: log likelihood = -682.7873 (not concave)
Iteration 93: log likelihood = -682.7873 (not concave)
Iteration 94: log likelihood = -682.7873 (not concave)
Iteration 95: log likelihood = -682.7873 (not concave)
Iteration 96: log likelihood = -682.7873 (not concave)
Iteration 97: log likelihood = -682.7873 (not concave)
Iteration 98: log likelihood = -682.78729 (not concave)
Iteration 99: log likelihood = -682.78729 (not concave)
Iteration 100: log likelihood = -682.78729 (not concave)
Iteration 101: log likelihood = -682.78729 (not concave)
Iteration 102: log likelihood = -682.78729 (not concave)
Iteration 103: log likelihood = -682.78729 (not concave)
Iteration 104: log likelihood = -682.78729 (not concave)
Iteration 105: log likelihood = -682.78729 (not concave)
Iteration 106: log likelihood = -682.78729 (not concave)
Iteration 107: log likelihood = -682.78729 (not concave)
Iteration 108: log likelihood = -682.78728 (not concave)
Iteration 109: log likelihood = -682.78728 (not concave)
Iteration 110: log likelihood = -682.78728 (not concave)
Iteration 111: log likelihood = -682.78728 (not concave)
Iteration 112: log likelihood = -682.78728 (not concave)
Iteration 113: log likelihood = -682.78728 (not concave)
Iteration 114: log likelihood = -682.78728 (not concave)
Iteration 115: log likelihood = -682.78728 (not concave)
Iteration 116: log likelihood = -682.78728 (not concave)
Iteration 117: log likelihood = -682.78728 (not concave)
Iteration 118: log likelihood = -682.78728 (not concave)
Iteration 119: log likelihood = -682.78727 (not concave)
Iteration 120: log likelihood = -682.78727 (not concave)
Iteration 121: log likelihood = -682.78727 (not concave)
Iteration 122: log likelihood = -682.78727 (not concave)
Iteration 123: log likelihood = -682.78727 (not concave)
Iteration 124: log likelihood = -682.78727 (not concave)
Iteration 125: log likelihood = -682.78727 (not concave)
Iteration 126: log likelihood = -682.78727 (not concave)
Iteration 127: log likelihood = -682.78727 (not concave)
Iteration 128: log likelihood = -682.78727 (not concave)
Iteration 129: log likelihood = -682.78727 (not concave)
Iteration 130: log likelihood = -682.78726 (not concave)
Iteration 131: log likelihood = -682.78726 (not concave)
Iteration 132: log likelihood = -682.78726 (not concave)
Iteration 133: log likelihood = -682.78726 (not concave)
Iteration 134: log likelihood = -682.78726 (not concave)
Iteration 135: log likelihood = -682.78726 (not concave)
Iteration 136: log likelihood = -682.78726 (not concave)
Iteration 137: log likelihood = -682.78726 (not concave)
Iteration 138: log likelihood = -682.78726 (not concave)
Iteration 139: log likelihood = -682.78726 (not concave)
Iteration 140: log likelihood = -682.78726 (not concave)
Iteration 141: log likelihood = -682.78726 (not concave)
Iteration 142: log likelihood = -682.78726 (not concave)
Iteration 143: log likelihood = -682.78725 (not concave)
Iteration 144: log likelihood = -682.78725 (not concave)
Iteration 145: log likelihood = -682.78725 (not concave)
Iteration 146: log likelihood = -682.78725 (not concave)
Iteration 147: log likelihood = -682.78725 (not concave)
Iteration 148: log likelihood = -682.78725 (not concave)
Iteration 149: log likelihood = -682.78725 (not concave)
Iteration 150: log likelihood = -682.78725 (not concave)
Iteration 151: log likelihood = -682.78725 (not concave)
Iteration 152: log likelihood = -682.78725 (not concave)
Iteration 153: log likelihood = -682.78725 (not concave)
Iteration 154: log likelihood = -682.78725 (not concave)
Iteration 155: log likelihood = -682.78725 (not concave)
Iteration 156: log likelihood = -682.78724 (not concave)
Iteration 157: log likelihood = -682.78724 (not concave)
Iteration 158: log likelihood = -682.78724 (not concave)
Iteration 159: log likelihood = -682.78724 (not concave)
Iteration 160: log likelihood = -682.78724 (not concave)
Iteration 161: log likelihood = -682.78724 (not concave)
Iteration 162: log likelihood = -682.78724 (not concave)
Iteration 163: log likelihood = -682.78724 (not concave)
Iteration 164: log likelihood = -682.78724 (not concave)
Iteration 165: log likelihood = -682.78724 (not concave)
Iteration 166: log likelihood = -682.78724 (not concave)
Iteration 167: log likelihood = -682.78724 (not concave)
Iteration 168: log likelihood = -682.78724 (not concave)
Iteration 169: log likelihood = -682.78724 (not concave)
Iteration 170: log likelihood = -682.78724 (not concave)
Iteration 171: log likelihood = -682.78724 (not concave)
Iteration 172: log likelihood = -682.78724 (not concave)
Iteration 173: log likelihood = -682.78723 (not concave)
Iteration 174: log likelihood = -682.78723 (not concave)
Iteration 175: log likelihood = -682.78723 (not concave)
Iteration 176: log likelihood = -682.78723 (not concave)
Iteration 177: log likelihood = -682.78723 (not concave)
Iteration 178: log likelihood = -682.78723 (not concave)
Iteration 179: log likelihood = -682.78723 (not concave)
Iteration 180: log likelihood = -682.78723 (not concave)
Iteration 181: log likelihood = -682.78723 (not concave)
Iteration 182: log likelihood = -682.78723 (not concave)
Iteration 183: log likelihood = -682.78723 (not concave)
Iteration 184: log likelihood = -682.78723 (not concave)
Iteration 185: log likelihood = -682.78723 (not concave)
Iteration 186: log likelihood = -682.78723 (not concave)
Iteration 187: log likelihood = -682.78723 (not concave)
Iteration 188: log likelihood = -682.78723 (not concave)
Iteration 189: log likelihood = -682.78723 (not concave)
Iteration 190: log likelihood = -682.78723 (not concave)
Iteration 191: log likelihood = -682.78722 (not concave)
Iteration 192: log likelihood = -682.78722 (not concave)
Iteration 193: log likelihood = -682.78722 (not concave)
Iteration 194: log likelihood = -682.78722 (not concave)
Iteration 195: log likelihood = -682.78722 (not concave)
Iteration 196: log likelihood = -682.78722 (not concave)
Iteration 197: log likelihood = -682.78722 (not concave)
Iteration 198: log likelihood = -682.78722 (not concave)
Iteration 199: log likelihood = -682.78722 (not concave)
Iteration 200: log likelihood = -682.78722 (not concave)
Iteration 201: log likelihood = -682.78722 (not concave)
Iteration 202: log likelihood = -682.78722 (not concave)
Iteration 203: log likelihood = -682.78722 (not concave)
Iteration 204: log likelihood = -682.78722 (not concave)
Iteration 205: log likelihood = -682.78722 (not concave)
Iteration 206: log likelihood = -682.78722 (not concave)
Iteration 207: log likelihood = -682.78722 (not concave)
Iteration 208: log likelihood = -682.78722 (not concave)
Iteration 209: log likelihood = -682.78722 (not concave)
Iteration 210: log likelihood = -682.78722 (not concave)
Iteration 211: log likelihood = -682.78722 (not concave)
Iteration 212: log likelihood = -682.78721 (not concave)
Iteration 213: log likelihood = -682.78721 (not concave)
Iteration 214: log likelihood = -682.78721 (not concave)
Iteration 215: log likelihood = -682.78721 (not concave)
Iteration 216: log likelihood = -682.78721 (not concave)
Iteration 217: log likelihood = -682.78721 (not concave)
Iteration 218: log likelihood = -682.78721 (not concave)
Iteration 219: log likelihood = -682.78721 (not concave)
Iteration 220: log likelihood = -682.78721 (not concave)
Iteration 221: log likelihood = -682.78721 (not concave)
Iteration 222: log likelihood = -682.78721 (not concave)
Iteration 223: log likelihood = -682.78721 (not concave)
Iteration 224: log likelihood = -682.78721 (not concave)
Iteration 225: log likelihood = -682.78721 (not concave)
Iteration 226: log likelihood = -682.78721 (not concave)
Iteration 227: log likelihood = -682.78721 (not concave)
Iteration 228: log likelihood = -682.78721 (not concave)
Iteration 229: log likelihood = -682.78721 (not concave)
Iteration 230: log likelihood = -682.78721 (not concave)
Iteration 231: log likelihood = -682.78721 (not concave)
Iteration 232: log likelihood = -682.78721 (not concave)
Iteration 233: log likelihood = -682.78721 (not concave)
Iteration 234: log likelihood = -682.78721 (not concave)
Iteration 235: log likelihood = -682.78721 (not concave)
Iteration 236: log likelihood = -682.78721 (not concave)
Iteration 237: log likelihood = -682.78721 (not concave)
Iteration 238: log likelihood = -682.78721 (not concave)
Iteration 239: log likelihood = -682.7872 (not concave)
Iteration 240: log likelihood = -682.7872 (not concave)
Iteration 241: log likelihood = -682.7872 (not concave)
Iteration 242: log likelihood = -682.7872 (not concave)
Iteration 243: log likelihood = -682.7872 (not concave)
Iteration 244: log likelihood = -682.7872 (not concave)
Iteration 245: log likelihood = -682.7872 (not concave)
Iteration 246: log likelihood = -682.7872 (not concave)
Iteration 247: log likelihood = -682.7872 (not concave)
Iteration 248: log likelihood = -682.7872 (not concave)
Iteration 249: log likelihood = -682.7872 (not concave)
Iteration 250: log likelihood = -682.7872 (not concave)
Iteration 251: log likelihood = -682.7872 (not concave)
Iteration 252: log likelihood = -682.7872 (not concave)
Iteration 253: log likelihood = -682.7872 (not concave)
Iteration 254: log likelihood = -682.7872 (not concave)
Iteration 255: log likelihood = -682.7872 (not concave)
Iteration 256: log likelihood = -682.7872 (not concave)
Iteration 257: log likelihood = -682.7872 (not concave)
Iteration 258: log likelihood = -682.7872 (not concave)
Iteration 259: log likelihood = -682.7872 (not concave)
Iteration 260: log likelihood = -682.7872 (not concave)
Iteration 261: log likelihood = -682.7872 (not concave)
Iteration 262: log likelihood = -682.7872 (not concave)
Iteration 263: log likelihood = -682.7872 (not concave)
Iteration 264: log likelihood = -682.7872 (not concave)
Iteration 265: log likelihood = -682.7872 (not concave)
Iteration 266: log likelihood = -682.7872 (not concave)
Iteration 267: log likelihood = -682.7872 (not concave)
Iteration 268: log likelihood = -682.7872 (not concave)
Iteration 269: log likelihood = -682.7872 (not concave)
Iteration 270: log likelihood = -682.7872 (not concave)
Iteration 271: log likelihood = -682.7872 (not concave)
Iteration 272: log likelihood = -682.7872 (not concave)
Iteration 273: log likelihood = -682.7872 (not concave)
Iteration 274: log likelihood = -682.7872 (not concave)
Iteration 275: log likelihood = -682.7872 (not concave)
Iteration 276: log likelihood = -682.7872 (not concave)
Iteration 277: log likelihood = -682.7872 (not concave)
Iteration 278: log likelihood = -682.78719 (not concave)
Iteration 279: log likelihood = -682.78719 (not concave)
Iteration 280: log likelihood = -682.78719 (not concave)
Iteration 281: log likelihood = -682.78719 (not concave)
Iteration 282: log likelihood = -682.78719 (not concave)
Iteration 283: log likelihood = -682.78719 (not concave)
Iteration 284: log likelihood = -682.78719 (not concave)
Iteration 285: log likelihood = -682.78719 (not concave)
Iteration 286: log likelihood = -682.78719 (not concave)
Iteration 287: log likelihood = -682.78719 (not concave)
Iteration 288: log likelihood = -682.78719 (not concave)
Iteration 289: log likelihood = -682.78719 (not concave)
Iteration 290: log likelihood = -682.78719 (not concave)
Iteration 291: log likelihood = -682.78719 (not concave)
Iteration 292: log likelihood = -682.78719 (not concave)
Iteration 293: log likelihood = -682.78719 (not concave)
Iteration 294: log likelihood = -682.78719 (not concave)
Iteration 295: log likelihood = -682.78719 (not concave)
Iteration 296: log likelihood = -682.78719 (not concave)
Iteration 297: log likelihood = -682.78719 (not concave)
Iteration 298: log likelihood = -682.78719 (not concave)
Iteration 299: log likelihood = -682.78719 (not concave)
Iteration 300: log likelihood = -682.78719 (not concave)
Iteration 301: log likelihood = -682.78719 (not concave)
Iteration 302: log likelihood = -682.78719 (not concave)
Iteration 303: log likelihood = -682.78719 (not concave)
Iteration 304: log likelihood = -682.78719 (not concave)
Iteration 305: log likelihood = -682.78719 (not concave)
Iteration 306: log likelihood = -682.78719 (not concave)
Iteration 307: log likelihood = -682.78719 (not concave)
Iteration 308: log likelihood = -682.78719 (not concave)
Iteration 309: log likelihood = -682.78719 (not concave)
Iteration 310: log likelihood = -682.78719 (not concave)
Iteration 311: log likelihood = -682.78719 (not concave)
Iteration 312: log likelihood = -682.78719 (not concave)
Iteration 313: log likelihood = -682.78719 (not concave)
Iteration 314: log likelihood = -682.78719 (not concave)
Iteration 315: log likelihood = -682.78719 (not concave)
Iteration 316: log likelihood = -682.78719 (not concave)
Iteration 317: log likelihood = -682.78719 (not concave)
Iteration 318: log likelihood = -682.78719 (not concave)
Iteration 319: log likelihood = -682.78719 (not concave)
Iteration 320: log likelihood = -682.78719 (not concave)
Iteration 321: log likelihood = -682.78719
Iteration 322: log likelihood = -682.77938 (not concave)
Iteration 323: log likelihood = -682.77938 (not concave)
Iteration 324: log likelihood = -682.77938 (not concave)
Iteration 325: log likelihood = -682.77938 (not concave)
Iteration 326: log likelihood = -682.77938 (not concave)
Iteration 327: log likelihood = -682.77938 (not concave)
Iteration 328: log likelihood = -682.77938 (not concave)
Iteration 329: log likelihood = -682.77938 (not concave)
Iteration 330: log likelihood = -682.77938 (not concave)
Iteration 331: log likelihood = -682.77938 (not concave)
Iteration 332: log likelihood = -682.77938 (not concave)
Iteration 333: log likelihood = -682.77938 (not concave)
Iteration 334: log likelihood = -682.77938 (not concave)
Iteration 335: log likelihood = -682.77938 (not concave)
Iteration 336: log likelihood = -682.77938 (not concave)
Iteration 337: log likelihood = -682.77938 (not concave)
Iteration 338: log likelihood = -682.77938 (not concave)
Iteration 339: log likelihood = -682.77938 (not concave)
Iteration 340: log likelihood = -682.77938 (not concave)
Iteration 341: log likelihood = -682.77938 (not concave)
Iteration 342: log likelihood = -682.77938 (not concave)
Iteration 343: log likelihood = -682.77938 (not concave)
Iteration 344: log likelihood = -682.77938 (not concave)
Iteration 345: log likelihood = -682.77938 (not concave)
Iteration 346: log likelihood = -682.77938 (not concave)
Iteration 347: log likelihood = -682.77938 (not concave)
Iteration 348: log likelihood = -682.77938 (not concave)
Iteration 349: log likelihood = -682.77938 (not concave)
Iteration 350: log likelihood = -682.77938 (not concave)
Iteration 351: log likelihood = -682.77938 (not concave)
Iteration 352: log likelihood = -682.77938 (not concave)
Iteration 353: log likelihood = -682.77938 (not concave)
Iteration 354: log likelihood = -682.77938 (not concave)
Iteration 355: log likelihood = -682.77938 (not concave)
Iteration 356: log likelihood = -682.77938 (not concave)
Iteration 357: log likelihood = -682.77938 (not concave)
Iteration 358: log likelihood = -682.77938 (not concave)
Iteration 359: log likelihood = -682.77938 (not concave)
Iteration 360: log likelihood = -682.77938 (not concave)
Iteration 361: log likelihood = -682.77938 (not concave)
Iteration 362: log likelihood = -682.77938 (not concave)
Iteration 363: log likelihood = -682.77938 (not concave)
Iteration 364: log likelihood = -682.77938 (not concave)
Iteration 365: log likelihood = -682.77938 (not concave)
Iteration 366: log likelihood = -682.77938 (not concave)
Iteration 367: log likelihood = -682.77938 (not concave)
Iteration 368: log likelihood = -682.77938 (not concave)
Iteration 369: log likelihood = -682.77938 (not concave)
Iteration 370: log likelihood = -682.77938 (not concave)
Iteration 371: log likelihood = -682.77938 (not concave)
Iteration 372: log likelihood = -682.77938 (not concave)
Iteration 373: log likelihood = -682.77938 (not concave)
Iteration 374: log likelihood = -682.77938 (not concave)
Iteration 375: log likelihood = -682.77938 (not concave)
Iteration 376: log likelihood = -682.77938 (not concave)
Iteration 377: log likelihood = -682.77938 (not concave)
Iteration 378: log likelihood = -682.77938 (not concave)
Iteration 379: log likelihood = -682.77938 (not concave)
Iteration 380: log likelihood = -682.77938 (not concave)
Iteration 381: log likelihood = -682.77938 (not concave)
Iteration 382: log likelihood = -682.77938 (not concave)
Iteration 383: log likelihood = -682.77938 (not concave)
Iteration 384: log likelihood = -682.77938 (not concave)
Iteration 385: log likelihood = -682.77938 (not concave)
Iteration 386: log likelihood = -682.77938 (not concave)
Iteration 387: log likelihood = -682.77938 (not concave)
Iteration 388: log likelihood = -682.77938 (not concave)
Iteration 389: log likelihood = -682.77938 (not concave)
Iteration 390: log likelihood = -682.77938 (not concave)
Iteration 391: log likelihood = -682.77938 (not concave)
Iteration 392: log likelihood = -682.77938 (not concave)
Iteration 393: log likelihood = -682.77938 (not concave)
Iteration 394: log likelihood = -682.77938 (not concave)
Iteration 395: log likelihood = -682.77938 (not concave)
Iteration 396: log likelihood = -682.77938 (not concave)
Iteration 397: log likelihood = -682.77938 (not concave)
Iteration 398: log likelihood = -682.77938 (not concave)
Iteration 399: log likelihood = -682.77938 (not concave)
Iteration 400: log likelihood = -682.77938 (not concave)
Iteration 401: log likelihood = -682.77938 (not concave)
Iteration 402: log likelihood = -682.77938 (not concave)
Iteration 403: log likelihood = -682.77938 (not concave)
Iteration 404: log likelihood = -682.77938 (not concave)
Iteration 405: log likelihood = -682.77938 (not concave)
Iteration 406: log likelihood = -682.77938 (not concave)
Iteration 407: log likelihood = -682.77938 (not concave)
Iteration 408: log likelihood = -682.77938 (not concave)
Iteration 409: log likelihood = -682.77938 (not concave)
Iteration 410: log likelihood = -682.77938 (not concave)
Iteration 411: log likelihood = -682.77938 (not concave)
Iteration 412: log likelihood = -682.77938 (not concave)
Iteration 413: log likelihood = -682.77938 (not concave)
Iteration 414: log likelihood = -682.77938 (not concave)
Iteration 415: log likelihood = -682.77938 (not concave)
Iteration 416: log likelihood = -682.77938 (not concave)
Iteration 417: log likelihood = -682.77938 (not concave)