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R6 Class Representing StartingValuesBSVART

Source: R/specify_bsvar_t.R
specify_starting_values_bsvar_t.Rd

The class StartingValuesBSVART presents starting values for the bsvar model with t-distributed structural shocks.

Super class

bsvars::StartingValuesBSVAR -> StartingValuesBSVART

Public fields

A

an NxK matrix of starting values for the parameter \(A\).

B

an NxN matrix of starting values for the parameter \(B\).

hyper

a (2*N+1)x2 matrix of starting values for the shrinkage hyper-parameters of the hierarchical prior distribution.

lambda

a NxT matrix of starting values for latent variables.

df

an Nx1 vector of positive numbers with starting values for the equation-specific degrees of freedom parameters of the Student-t conditional distribution of structural shocks.

Methods

Public methods

Method new()

Create new starting values StartingValuesBSVART

Usage

specify_starting_values_bsvar_t$new(A, B, N, p, T, d = 0)

Arguments

A

a logical NxK matrix containing value TRUE for the elements of the autoregressive matrix \(A\) to be estimated and value FALSE for exclusion restrictions to be set to zero.

B

a logical NxN matrix containing value TRUE for the elements of the staructural matrix \(B\) to be estimated and value FALSE for exclusion restrictions to be set to zero.

N

a positive integer - the number of dependent variables in the model.

p

a positive integer - the autoregressive lag order of the SVAR model.

T

a positive integer - the the time series dimension of the dependent variable matrix \(Y\).

d

a positive integer - the number of exogenous variables in the model.

Returns

Starting values StartingValuesBSVART

Method get_starting_values()

Returns the elements of the starting values StartingValuesBSVAR as a list.

Usage

specify_starting_values_bsvar_t$get_starting_values()

Examples

# starting values for a homoskedastic bsvar with 1 lag for a 3-variable system
A = matrix(TRUE, 3, 4)
B = matrix(TRUE, 3, 3)
sv = specify_starting_values_bsvar$new(A = A, B =  B, N = 3, p = 1)
sv$get_starting_values()   # show starting values as list

Method set_starting_values()

Returns the elements of the starting values StartingValuesBSVAR as a list.

Usage

specify_starting_values_bsvar_t$set_starting_values(last_draw)

Arguments

last_draw

a list containing the last draw of elements B - an NxN matrix, A - an NxK matrix, and hyper - a vector of 5 positive real numbers.

Returns

An object of class StartingValuesBSVAR including the last draw of the current MCMC as the starting value to be passed to the continuation of the MCMC estimation using estimate().

Examples

# starting values for a homoskedastic bsvar with 1 lag for a 3-variable system
A = matrix(TRUE, 3, 4)
B = matrix(TRUE, 3, 3)
sv = specify_starting_values_bsvar$new(A = A, B = B, N = 3, p = 1)

# Modify the starting values by:
sv_list = sv$get_starting_values()   # getting them as list
sv_list$A <- matrix(rnorm(12), 3, 4) # modifying the entry
sv$set_starting_values(sv_list)      # providing to the class object

Method clone()

The objects of this class are cloneable with this method.

Usage

specify_starting_values_bsvar_t$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

# starting values for a bsvar model for a 3-variable system
A = matrix(TRUE, 3, 4)
B = matrix(TRUE, 3, 3)
sv = specify_starting_values_bsvar_t$new(A = A, B = B, N = 3, p = 1, T = 100)


## ------------------------------------------------
## Method `specify_starting_values_bsvar_t$get_starting_values`
## ------------------------------------------------

# starting values for a homoskedastic bsvar with 1 lag for a 3-variable system
A = matrix(TRUE, 3, 4)
B = matrix(TRUE, 3, 3)
sv = specify_starting_values_bsvar$new(A = A, B =  B, N = 3, p = 1)
sv$get_starting_values()   # show starting values as list
#> $B
#>            [,1]      [,2]    [,3]
#> [1,] 0.05101492 0.0000000 0.00000
#> [2,] 0.00000000 0.5314115 0.00000
#> [3,] 0.00000000 0.0000000 0.58396
#> 
#> $A
#>           [,1]      [,2]      [,3] [,4]
#> [1,] 0.8342324 0.0000000 0.0000000    0
#> [2,] 0.0000000 0.4039433 0.0000000    0
#> [3,] 0.0000000 0.0000000 0.1752685    0
#> 
#> $hyper
#>      [,1] [,2]
#> [1,]   10   10
#> [2,]   10   10
#> [3,]   10   10
#> [4,]   10   10
#> [5,]   10   10
#> [6,]   10   10
#> [7,]   10   10
#> 


## ------------------------------------------------
## Method `specify_starting_values_bsvar_t$set_starting_values`
## ------------------------------------------------

# starting values for a homoskedastic bsvar with 1 lag for a 3-variable system
A = matrix(TRUE, 3, 4)
B = matrix(TRUE, 3, 3)
sv = specify_starting_values_bsvar$new(A = A, B = B, N = 3, p = 1)

# Modify the starting values by:
sv_list = sv$get_starting_values()   # getting them as list
sv_list$A <- matrix(rnorm(12), 3, 4) # modifying the entry
sv$set_starting_values(sv_list)      # providing to the class object