PSTR 2.0.0 ‘Green Panel’

Breaking changes

• The internal architecture is fully refactored to an R6 design.
• Direct access to internal slots is no longer supported.
• Users relying on previous S3-style behaviour may need to update their code.

New features

• The PSTR class now follows an R6 design with reference semantics.
• The main modelling steps are implemented as class methods.
• Exported wrapper functions remain available for backward compatibility.
• The command line output is redesigned using the cli package.
• The print layout is modernised using knitr::kable.
• Separate print views are available for summary, tests, estimation, and evaluation.
• Internal getters and setters are added to support a clean R6 workflow.

Improvements

• Evaluation and bootstrap routines are rewritten under the R6 structure.
• Result objects are stored with consistent naming (tv, ht, wcb_tv, wcb_ht).
• Numerical robustness is improved in near-singular matrix inversion cases.
• An SVD-based pseudoinverse is used when necessary.
• Bootstrap routines use deep cloning to avoid overwriting the original object.
• Internal print helpers are reorganised into dedicated private methods.

New Features in PSTR 1.3.0 ‘Yellow Panel’

• fix the errors in R version 4.
• change documentation.

New Features in PSTR 1.2.5 ‘Orange Panel’

• fix the bug in the function “plot_transition”.
• fix the bug in the function “plot_coefficients”.

New Features in PSTR 1.2.4 ‘Orange Panel’

• improve the plotting function “plot_transition” and “plot_response”.
• add new plotting function “plot_coefficients”.
• change documentation.

New Features in PSTR 1.2.3 ‘Orange Panel’

• fix some bugs found in the previous version.

New Features in PSTR 1.2.2 ‘Orange Panel’

• fix some bugs found in the previous version.

New Features in PSTR 1.2.1 ‘Orange Panel’

• Link to the working paper.

New Features in PSTR 1.2.0 ‘Orange Panel’

• New function “plot_response” which use the ggplot2 and plotly packages to plot the curve or surface of the expected response (contribution) against some variable and the transition variable.
• The estimation function “EstPSTR” will return the estimated time-invariante individule effects.
• The width of the separating lines in printing the results can adjust itself automatically to fit the width of the console.
• Rewrite the “version” function.

New Features in PSTR 1.1.0 ‘Red Panel’

• Better documentation.
• In the function “EstPSTR”, now the initial value for “gamma” is allowed. The user can freely choose either “gamma” or “delta” to input for the estimation.
• Estimation of a linear panel regression model with fixed effects.
• The initial values can now be chosen automatically and will be returned after estimation.
• New function “plot_transition” which use the ggplot2 package to plot the estimated transition function.
• The package ggplot2 imported.
• A new data set “sunspot” included.
• Some bugs fixed.

New Featurs in PSTR 1.0.1

• All the functions
• Documetation including README, LICENSE and etc.