stepan-a

% Define some data.

ydata = [ 281007.5986
          309129.2123
          297609.241 
          317353.2609
          284676.2167
          319282.2681
          310842.9111
          324842.4655

stepan-a

// Declaration of some endogenous variables.
var c;

/*
** REMARKS
**
** Some declarations for the endogenous variables are missing. They are declared below in
** the model block.
**
*/

stepan-a

var white_noise ar1 junk;
varexo e;

parameters phi;

phi=1;

model;
white_noise=e;
ar1=phi*ar1(-1)+e;

stepan-a

Starting Dynare (version 4.5-unstable).
Starting preprocessing of the model file ...
Found 11 equation(s).
Evaluating expressions...done
Computing static model derivatives:
 - order 1
Computing dynamic model derivatives:
 - order 1
 - order 2
Processing outputs ...done

stepan-a

var Capital, Output, Labour, Consumption, Efficiency, efficiency ;

varexo EfficiencyInnovation;

parameters beta, theta, tau, alpha, Epsilon, delta, rho, effstar, sigma;

/*
** Calibration
*/

stepan-a

var c k;
varexo x;

parameters alph gam delt bet;
alph=0.5;
gam=0.5;
delt=0.02;
bet=0.05;

stepan-a

var y;

varexo e;

parameters rho, sigma, ybar;

ybar = 2;
rho = .99;
sigma = .01;

stepan-a

var y;

varexo e;

parameters rho, sigma, ybar;

ybar = 2;
rho = .99;
sigma = .01;

stepan-a

    var Consumption, Capital, Output, LoggedProductivity;

    varexo LoggedProductivityInnovation ; 

    parameters beta, alpha, delta, rho ; 

    beta = .99;
    alpha = .33;
    delta = .02;
    rho = .98;

stepan-a

Global constant should be avoided in Matlab/Octave. The reason is that Matlab checks, on every call to a function with global variables, that the globals are not changed. To illustrate this we consider an example where we need to cumulate a constant. This constant can be defined as a global variable, in a function or as an input argument of a function. Running the matlab's script test.m, shows that the code with a global constant (fun_with_global_constant.m) is 30 slower than the code where the constant is defined in a function (fun_without_global_constant.m and getconstant.m) and 60 times slower than the code where the constant is passed as an argument (fun_with_arg.m).