Grocer: an econometric toolbox for Scilab

(Painting by Marion Dubois: thanks Marion! for more pictures see Marion's web page )

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What is Grocer?

Grocer is the econometric toolbox for Scilab, a matrix-oriented software similar to Gauss and Matlab, that I have developed, first alone and since 2005 with Emmnanuel Michaux. The current version works with Scilab versions until the 4.1.2 and from the 5.2.0 (the versions in between being inferior both to the 4.1.2 and the most recent versions, I do not maintain Grocer anymore for these Scilab versions: if for any reason, you nevertheless need it, e-mail me and I will then restore Grocer for these versions).
Like Scilab, Grocer is free and open source.

Grocer Capabilities:

- ordinary least squares and various single equation methods (autocorrelated models, instrumental variables, non linear least squares, robust methods, quantile regression...)
- basic estimation with limited dependent variables: ordered logit and probit (with 2 or more variables); tobit; multivariate logit
- specification tests (multicolinearity, autocorrelation, heteroskedasticity, normality, predictive failure,...)
- simultaneous equations methods (SUR, two and three stage least squares,...)
- VAR, VECM, VARMA and GARCH estimation
- the Generalized Method of Moments (GMM)
- the Kalman filter and time varying parameters estimation
- unit root tests (ADF, KPSS,...), panel unit roots and cointegration methods (CADF, Johansen,...)
- various business cycle tools: HP, Baxter-King and Christiano-Fitzgerald filters, the Bry-Boschan-Harding-Pagan procedure for the dating of turning points, spectral analysis
- various panel data estimation methods: fixed and random effects, between estimation and panel models with common correlated effects
- Static and Dynamic factor estimation
- numerous time series disaggregation methods: Chow-Lin, Litterman,...
- a syntactic analyzer and a symbolic derivative program
- an optimization program that mixes various optimization devices to gain robustness
- a pc-gets like device, that performs automatic general to specific estimations, including a block search algorithm to deal with the case when there are more variables than observations
- estimation of Markov-switching models
- Bayesian Model Averaging estimation and bayesian structural time-varying VAR estimation
- a contributions device, that provides contributions of exogenous variables to an endogenous one for any dynamic equation

You can download:


e-mail: grocer.toolbox[at] (of course, replace [at] with @).

What's new:

(2015/10/03): Grocer version 1.7 has been posted on the web. You can download Grocer in 2 different versions, according to the Scilab version you use:

  • until the 4.1.2 version,
  • from the 5.2.0 version.
  • The main novelties of the 1.7 with respect to the previous 1.67 version are the following:

  • Function automatic has been extended to incorporate the block search algorithm proposed by J. Doornik to deal with problems when the number of variables is greater than the number of observations. Grocer block search has been compared to Doornik Autometrics block search program for the battery of tests used by Doorik in his 2009 paper. These results of these tests are presented in chapter 15 of Grocer manual and can be reproduced using the material given here: they show that Grocer block search program compares favourably with Autometrics one.
  • In the same vein, function ols has also been extended to allow impulse saturation, the methodolgy proposed by Castle, Doornik and Hendry to test the the presence of structural breaks in an equation.

  • A new Function Hetero_TVP_VAR has been created to allow the estimation of a structural VAR with varying coefficents and volatilities, estimated in bayesian framework using a Monte-Carlo Markov Chain (MCMC) algorithm. The user can adapt the priors to her needs and a function tvpvar_prior helps helps her to enter her choices. The function also come with a function Hetero_TVP_VAR_stresid that plots the -time varying- standard deviations of the residuals and a function Hetero_TVP_VAR_irf that plots the -time varying- impulse response functions of the VAR. It also comes with a function tvpvar_diagnos that performs convergence diagnostics. Latsly, functions MCMC_autocorr, that calculates autocorrelation of draws for a given set of parameters, geweke_diagnos that performs Geweke''s numerical std error, relative numerical efficiencies and inefficiencies and raftery that performs Raftery and Lewis (1991) convergence diagnostic, that is the # of draws needed in MCMC to estimate the posterior cdf of the q-quantile to within +/- r accuracy with probability s, can be used for various other bayesian estimations using the MCMC algorithm. Function wish_rnd and wish_rnd1, that makes randow draw in a Wishart law have also been added.
  • A function msvar_irf_cb, written by Stefan Fiesel, that performs confidence bands around impulse response functions in a Markov-switching VAR model, has been added. This has also lead to write a function msvar_draw that draws at random an artifical Markov-switching VAR with any set of parameters.

  • Functions findobject and strsubst_trueobj, that find if an object name is truly in a mathematical formula and to replace object names by another name in a mathemtical formula, have been documented.

  • Minor adjustements have been made to numerous functions, in order to adapt them to the coming Scilab 6.0 version: this should not change Grocer working for older versions, but has nevertheless the advantage to make the code somehow cleaner (Grocer cannot be installed for the moment with the Scilab 6.0.alpha, because the installation programs has yet to be adpated; but Grocer functions can nevertheless be run using less straightforward means: if you are an experienced user and are interested in testing Grocer under Scilab 6.0.alpha, send me an a-mail and I will indicate you how to proceed).
  • The user manual has been modified accordingly and slightly enhanced (correction of typos, of a few errors,...).

    WARNING: With the coming release of Scilab 6.0 and because of the changes Siclab 6.0 entails to Grocer implementation, I plan that next Grocer releases work "only" with Scilab versions from the 5.4 one and not with older ones. If this poses a problem to you, do not hesitate to signal it to me by e-mail.

    To see older modifications, see here

    Last updated: 2015/10/03