Gretl Manual: Gnu Regression, Econometrics and Time-series Library | ||
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Prev | Chapter 10. Command Reference | Next |
Table 10-2 shows the estimators available under the Model menu in gretl's main window. The corresponding script command (if there is one available) is shown in parentheses. For details consult the command's entry in Chapter 10.
Table 10-2. Estimators
Estimator | Comment |
---|---|
Ordinary Least Squares (ols) | The workhorse estimator |
Weighted Least Squares (wls) | Heteroskedasticity, exclusion of selected observations |
HCCM (hccm) | Heteroskedasticity corrected covariance matrix |
Heteroskedasticity corrected (hsk) | Weighted Least Squares based on predicted error variance |
Cochrane–Orcutt (corc) | First-order autocorrelation |
Hildreth–Lu (hilu) | First-order autocorrelation |
Autoregressive Estimation (ar) | Higher-order autocorrelation (generalized Cochrane–Orcutt) |
Vector Autoregression (var) | Systems of time-series equations |
Cointegration test (coint) | Long-run relationships between series |
Two-Stage Least Squares (tsls) | Simultaneous equations |
Nonlinear Least Squares (nls) | Nonlinear models |
Logit (logit) | Binary dependent variable (logistic distribution) |
Probit (probit) | Binary dependent variable (normal distribution) |
Least Absolute Deviation (lad) | Alternative to Least Squares |
Rank Correlation (spearman) | Correlation with ordinal data |
Pooled OLS (pooled) | OLS estimation for pooled cross-section, time series data |
Multiple precision OLS (mpols) | OLS estimation using multiple precision arithmetic |
Table 10-3 shows the tests that are available under the Tests menu in a model window, after estimation.
Table 10-3. Tests for models
Test | Corresponding command |
---|---|
Omit variables (F-test if OLS) | omit |
Add variables (F-test if OLS) | add |
Nonlinearity (squares) | lmtest |
Nonlinearity (logs) | lmtest |
Nonlinearity (Ramsey's RESET) | reset |
Heteroskedasticity (White's test) | lmtest |
Influential observations | leverage |
Autocorrelation up to the data frequency | lmtest -o |
Chow (structural break) | chow |
CUSUM (parameter stability) | cusum |
ARCH (conditional heteroskedasticity) | arch |
Normality of residual | testuhat |
Panel diagnostics | hausman |
Table 10-4 shows the correspondence between the long-form option flags used in the command reference above and the short versions.
Table 10-4. Long- and short-form options
Command | Option | Effect | Short form |
---|---|---|---|
arma | --x-12-arima | estimate with X-12-ARIMA | -x |
--verbose | print iteration details | -v | |
coint2 | --verbose | print details of VARs | -v |
eqnprint, tabprint | --complete | complete TeX document | -o |
fcasterr | --plot | show graph | -o |
gnuplot | --with-lines | plot with lines | -o |
--with-impulses | plot with impulses | -m | |
--suppress-fitted | don't show fitted line | -s | |
--dummy | factor separation | -z | |
import | --box1 | import BOX1 data | -o |
leverage | --save | save values to dataset | -s |
lmtest | --logs | non-linearity (logs) | -l |
--squares | non-linearity (squares) | -s | |
--white | White's test (heteroskedasticity) | -w | |
--autocorr | serial correlation | -m | |
meantest | --unequal-vars | assume unequal variances | -o |
leverage | --save | save values to dataset | -s |
ols | --robust | robust standard errors | -r |
--vcv | print covariance matrix | -o | |
--quiet | don't print results | -q | |
outfile | --write | open file for writing | -w |
--append | append to existing file | -a | |
--close | close file | -c | |
panel | --time-series | stacked time series | -s |
--cross-section | stacked cross-sections | -c | |
pca | --save | save useful eigenvectors | -s |
--save-all | save all eigenvectors | -a | |
pergm | --bartlett | use Bartlett lag window | -o |
plot | --one-scale | don't scale variables | -o |
--byobs | variables in columns | -o | |
--ten | use 10 significant figures | -t | |
smpl | --dummy | restrict using dummy var | -o |
--no-missing | only complete observations | -m | |
--restrict | use boolean criterion | -r | |
spearman | --verbose | print original, ranked data | -o |
square | --cross | generate cross-products | -o |
store | --cross | generate cross-products | -o |
store | --csv | comma-separated values | -c |
--traditional | traditional ESL format | -t | |
--gnu-octave | GNU Octave format | -m | |
--gnu-R | GNU R format | -r | |
--gzipped | gzip compression | -z | |
var | --quiet | don't print all results | -q |
Model commands | --vcv | print covariance matrix | -o |