sysbreak: Structural Breaks in a System of Equations

Methods for detecting, estimating, and conducting inference on multiple structural breaks in a linear system of equations, such as multivariate linear regressions, seemingly unrelated regressions, vector autoregressions, and network vector autoregressions. Breaks can occur in the regression coefficients, the covariance matrix of the errors, or both, and can be restricted to a subset of the coefficients. The main function, sysbreak(), returns the number of breaks detected and confidence intervals for the break dates and for the regression coefficients. A separate function ordbreak() estimates ordered breaks, in which a break in one subset of equations occurs before a break in another. Specialized functions for vector autoregressions varbreak() and network vector autoregressions netbreak() are also provided. Reference: Qu, Z., and Perron, P. (2007). 'Estimating and Testing Structural Changes in Multivariate Regressions.' Econometrica, 75(2), 459-502.

Version:	1.1.0
Depends:	R (≥ 4.3.0)
Imports:	graphics, grDevices, MASS, stats, utils
Suggests:	knitr, rmarkdown, testthat (≥ 3.0.0)
Published:	2026-10-31
DOI:	10.32614/CRAN.package.sysbreak
Author:	Zhongjun Qu [aut, cre], Cheolju Kim [aut], Pierre Perron [aut]
Maintainer:	Zhongjun Qu <qu at bu.edu>
License:	GPL (≥ 3)
NeedsCompilation:	no
Materials:	README, NEWS
CRAN checks:	sysbreak results

Documentation:

Reference manual:	sysbreak.html , sysbreak.pdf
Vignettes:	Introduction to sysbreak (source, R code)

Downloads:

Package source:	sysbreak_1.1.0.tar.gz
Windows binaries:	r-devel: not available, r-release: sysbreak_1.1.0.zip, r-oldrel: sysbreak_1.1.0.zip
macOS binaries:	r-release (arm64): sysbreak_1.1.0.tgz, r-oldrel (arm64): sysbreak_1.1.0.tgz, r-release (x86_64): sysbreak_1.1.0.tgz, r-oldrel (x86_64): sysbreak_1.1.0.tgz

Linking:

Please use the canonical form https://CRAN.R-project.org/package=sysbreak to link to this page.