# Unconditional variance: zeros and NaNs
**URL:** https://discourse.macromodelbase.com/t/unconditional-variance-zeros-and-nans/71
**Category:** Execution of model Comparison
**Created:** [February 20, 2019, 7:08am UTC](https://discourse.macromodelbase.com/t/unconditional-variance-zeros-and-nans/71 "2019-02-20T07:08:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@hawkins](https://discourse.macromodelbase.com/u/hawkins)
#### Post date: [February 20, 2019, 7:08am UTC](https://discourse.macromodelbase.com/t/unconditional-variance-zeros-and-nans/71/1 "2019-02-20T07:08:23Z")
Hi All,
Running v2.3.2 to see how the Taylor rule works across models with a monetary policy shock, I encountered zeros and NaNs for a number of models (cf. below). Is this expected behavior or does it indicate an installation problem?
Thanks,
## Ray
Model Interest Inflation Outputgap Output
NK\_RW97 0.079687 0.061910 0.389011 1.170185
NK\_LWW03 4.677007 0.803340 18.005086
NK\_CGG99 0.403511 1.672616 11.180891
NK\_CGG02 0.000000 0.000000 0.000000 0.000000
NK\_MCN99cr 4.552730 1.324597 1.552290
NK\_IR04 6.205939 2.519643 0.105360 50.452929
NK\_BGG99 0.000000 0.000000 0.000000 NaN
NK\_GM05 0.850931 0.349508 0.151881 0.440556
NK\_GK09lin 0.000000 0.000000 0.000000 0.000000
NK\_CK08 3.499437 0.481532 3.575186 3.575186
NK\_CKL09 1.427580 0.118462 0.190884 0.684910
NK\_RW06 0.000000 0.000000 0.000000
US\_CMR14 23.081597 13.044670 26.282135 168.027031
US\_FRB03 164.374345 8.456621 239.064000 215.595130
US\_FRB08 NaN NaN NaN NaN
US\_FRB08mx NaN NaN NaN NaN
US\_SW07 24.412989 20.236693 18.258208 30.842104
US\_ACELm 0.452592 0.317296 0.400555 0.860964
US\_ACELt 0.061933 0.066297 0.438336 0.384399
US\_ACELswm 0.286504 0.188399 0.351306 0.605484
US\_ACELswt 0.043843 0.056461 0.448951 0.367126
US\_RS99 24.363090 11.888077 5.170883 5.170883
US\_OR03 21.252609 10.581111 5.915766 5.915766
US\_PM08 4.577176 1.270099 1.773423 1.773423
US\_PM08fl 5.215986 1.690203 1.123906 1.123906
US\_DG08 3.499271 0.690237 4.572434 18.261754
US\_CD08 1.252488 0.620759 0.713709 1.907218
US\_IAC05 2.541675 0.764162 5.426554 3.720427
US\_MR07 NaN 0.000893 NaN NaN
US\_RA07 55.640950 20.631710 15.248460 201.811067
US\_CCTW10 30.364712 24.378764 20.390743 29.731331
US\_IR11 80.089518 34.197288 0.239419 1.114090
EA\_CW05ta 3.994667 1.202740 2.782745 2.782745
EA\_CW05fm 16.548180 6.563988 2.779097 2.779097
EA\_AWM05 4.724320 1.205157 4.528152 4.593630
EA\_SW03 3.326490 0.772280 3.681759 6.435739
EA\_SR07 12.347281 9.212859 10.105732 25.771420
EA\_QUEST3 34.417157 14.894980 2.941532
EA\_CKL09 4.481231 0.932265 3.693269 0.521844
EA\_GE10 25.053068 25.540021 34.635020 23.936881
G7\_TAY93 27.953069 6.911255 16.707190 16.707190
G3\_CW03 5.661569 2.494527 3.444601 3.444601
EACZ\_GEM03 1.397075 1.048501 0.691074 5.015016
G2\_SIGMA08 NaN NaN NaN NaN
EAUS\_NAWM08 0.000000 0.000000 0.000000 0.000000
EAES\_RA09 NaN NaN NaN NaN
CL\_MS07 11.036665 5.456832 5.751626 24.721564
BRA\_SAMBA08 194.388354 156.213704 223.732961 210.313389
CA\_LS07 1.238851 0.453947 0.144304 6.173727
HK\_FPP11 25.705900 10.210023 2.385025 9.164768
US\_IN10 4.801574 2.694995 1.633556 26.716691
US\_CMR10 60.611065 50.253281 45.104854 11.148996
US\_CMR10fa 214.972254 202.969781 214.326605 24.664625
US\_VMDno 0.975466 0.000302 0.000862 0.000862
US\_VMDop 0.977966 0.003293 0.006946 0.006946
NK\_KRS12 5.046381 2.107468 0.115121 42.894780
HK\_FP13 1.711880 3.195013 18.266004 7.507345
EAUS\_NAWMctww 0.000000 0.000000 0.000000 0.000000
NK\_CW09 9.731202 4.883404 18.867234 39.914615
GPM6\_IMF13 6.317395 1.797355 2.783221 NaN
CA\_BMZ12 2.336883 1.224671 2.200270 8.546637
NK\_GK11 0.021965 0.006500 0.003350 0.230231
US\_FM95 12.752560 6.296420 7.167006 7.167006
EA\_QR14 2.097362 0.749835 0.137919 3.028901
NK\_ET14 77.386394 32.191607 1.236780 0.010429
NK\_GK13 0.014839 0.006151 0.002778 0.026037
NK\_BGEU10 44.649531 1.459568 96.904006 486.027136
NK\_BGUS10 12.898841 1.626958 11.644303 60.805102
RBC\_DTT11 8.939180 3.972969 0.000000 9.236175
US\_CFOP14 16.527090 10.033147 9.201794 13.957863
US\_JPT11 412.770596 376.012382 331.238120 343.659447
US\_CPS10 7959.623357 8235.842000 679.786756 680.637585
NK\_NS14 0.213125 0.030728 0.198233 2.021986
US\_DNGS15 43.357347 33.177272 27.705810 71.509123
US\_FMS134 17.864448 12.537112 20.136361 63.009782
US\_FGKR15 2.821174 1.008334 4.669918 4.280918
EA\_PV15 1.337877 0.597458 0.009323 4.595406
NK\_CFP10 2.259158 2.311260 4.264075 58.597037
NK\_GM07 1.825386 0.530769 1.231865 19.261526
NK\_KW16 12490.433602 1418.447293 1288.808392 14140.442853
NK\_MPT10 7928.641453 463.225709 166.731827 314.449453
NK\_PP17 2.159000 1.047385 0.812542 3.120551
NK\_PSV16 0.000000 0.000000 0.000000 0.000000
NK\_RA16 3.668810 1.208202 0.056475 7.153163
NK\_ST13 8873.706607 15.491065 113.279903 113.280450
US\_AJ16 0.029234 0.007757 0.034350 0.433735
US\_CFP17endo 22.153485 18.933509 48.647138 169.837837
US\_CFP17exo 27.426847 14.105095 28.352502 142.497064
US\_DNGS15SW 10307.498550 9684.055372 8641.361410 9774.877443
US\_DNGS15SWpi 46168.027241 45039.723405 42990.807792 44338.265773
US\_DNGS15SWSP 30261.911544 27462.219867 22609.648619 22650.060611
US\_FV15 45.673994 17.831025 6.234815 95.359889
US\_IR15 39.654714 32.257927 189.276824 189.276824
US\_LWY13 5.997369 3.088065 2.158275 9.673753
US\_RE09 1554.091339 1551.610028 1554.905018 NaN
NK\_GLSV07 0.000000 0.000000 0.000000 0.000000
---
### Author:  [@Lazar](https://discourse.macromodelbase.com/u/Lazar)
#### Post date: [December 10, 2019, 7:59pm UTC](https://discourse.macromodelbase.com/t/unconditional-variance-zeros-and-nans/71/2 "2019-12-10T19:59:11Z")
Dear Prof. Hawkins,
I responded to you in our email conversation some time ago.
However, I decided to copy that answer in case others have the same concerns.
Some models feature unit roots and therefore do not calculate respective moments (NK\_BGG99, US\_RE09, EAES\_RA09, US\_FRB08 among others).
The MMB 2.3 additionally contains models in which variances are zero as the shocks in the mod files are commented out (NK\_CGG02, NK\_GK09lin, NK\_GLSV07, NK\_MM10, NK\_PSV16, NK\_RW06, G2\_SIGMA08, EAUS\_NAWM08, for instance).
Hope this helps.
Best regards!