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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.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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