# 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.