urca-internal {urca}R Documentation

Critical values for Schmidt & Phillips Unit Root Test

Description

This function is an internal function and is called by ur.sp. It computes the critical value of the Schmidt & Phillips test, given a level of significance, the polynomial degree of the test regression, the test type and the sample size.

Usage

.spcv(obs, type, pol.deg, signif)

Arguments

obs The sample size.
type The test type.
pol.deg The polynomial degree.
signif The significance level.

Value

The critical value of the test.

Author(s)

Bernhard Pfaff

References

Schmidt, P. and Phillips, P.C.B. (1992), LM Test for a Unit Root in the Presence of Deterministic Trends, Oxford Bulletin of Economics and Statistics, 54(3), 257–287.

Download possible at: http://cowles.econ.yale.edu/, see rubric 'Discussion Papers (CFDPs)'.

See Also

ur.sp.


[Package urca version 1.1-6 Index]