MV_critical {mlrv}

Statistics-adapted values for extended minimum volatility selection.

Description

Calculation of the variance of the bootstrap statistics for the extended minimum volatility selection.

Usage

MV_critical(
  y,
  data,
  R,
  gridm,
  gridtau,
  type = 1L,
  cvalue = 0.1,
  B = 100L,
  lrvmethod = 1L,
  ind = 2L,
  rescale = 0L
)

Arguments

y

vector, as used in the Heter_LRV

data

list, a list of data

R

a cube of standard.normal random variables.

gridm

vector, a grid of candidate m's.

gridtau

vector, a grid of candidate tau's.

type

integer, 1 KPSS 2 RS 3 VS 4 KS

cvalue

double, 1-quantile for the calculation of bootstrap variance, default 0.1.

B

integer, number of iterations for the calculation of bootstrap variance

lrvmethod

integer, see also Heter_LRV

ind

integer, the type of kernel, see also Heter_LRV

rescale

bool, whether to rescale when positiveness of the matrix is not obtained. default 0

Value

a matrix of critical values

References

Bai, L., & Wu, W. (2024). Difference-based covariance matrix estimation in time series nonparametric regression with application to specification tests. Biometrika, asae013.

See Also

Heter_LRV

Examples

###with Long memory parameter 0.2
param = list(d = -0.2, heter = 2,
 tvd = 0, tw = 0.8, rate = 0.1, cur = 1,
  center = 0.3, ma_rate =  0, cov_tw =  0.2,
  cov_rate = 0.1, cov_center = 0.1,
  all_tw  = 1, cov_trend = 0.7)
n = 1000
data = Qct_reg(n, param)
p = ncol(data$x)
t = (1:n)/n
B_c = 100 ##small value for testing
Rc = array(rnorm(n*p*B_c),dim = c(p,B_c,n))
result1 = LocLinear(0.2, t, data$y, data$x)
critical <- MV_critical(data$y, result1, Rc, c(3,4,5), c(0.2, 0.25, 0.3))