- The
**elasticity**and thus**elasticity_fig**are much faster now.

- An example in
**elasticity_fig**has been corrected (there is no error now). The*price_indices*function has been corrected due to the*lloyd-moulton*sub-function.

- New functions for price imputations (
*data_imputing*) and for detecting new and disappearing products (*products*and*products_fig*).

- The
**data_preparing**function has now two additional parameters which allow to consider zero prices and zero quantities. - New methods for
**elasticity**and**elasticity_fig**functions have been added.

- a new parameter has beed added to the function ‘price_indices’
(
*names*). It allows to compare e.g. the same splice multilateral index but for many different splicing methods (their names can be distinguished). - The
*geksj*function has been corrected for the case when we observe large number of decreasing prices.

- New functions for bennet price and quantity indicators have been
added (
*bennet*and*mbennet*). - New function for comparison of price indices by using the jackknife
method has been added (
*compare_indices_jk*).

- A new parameter has beed added to the function ‘price_indices’
(
*names*). It allows to compare e.g. the same splice multilateral index but for many different splicing methods (their names can be distinguished). - The
*geksj*function has been corrected for the case when we observe large number of decreasing prices. - Problems with examples have been deleted (‘donttest{}’ formula is used)

- Graphical result of the
**compare_indices_list**function has been corrected (a label concerning the X-axis is now named ‘date’) - References have been updated in the case of the
*generate*function. - A wrong example concerning the
*geksgaqi_splice*function has been deleted.

- New functions added: a) bilateral methods -
*value_index*,*unit_value_index*,*QMp*,*IQMp*,*QMq*; b) chain indices:*chQMp*,*chIQMp*,*chQMq*; c) multilateral methods:*gekslm*,*geksqm*,*geksiqm*,*utpd*+ their extensions (splice, FMW, FBEW). New function for generating artficial scanner datasets (*generate_CES*). Moreover: new (faster) function*price_indices*, new functions for price comparisons:*compare_indices_df*and*compare_indices_list*(old functions:*compare_indices*and*compare_final_indices*were removed). Rebuilt function*final_index*(old function*final_index2*was removed). Rebuilt functions:*elasticity*and*elasticity_fig*(old functions*elasticity2*and*elasticity_fig2*were removed).

- Improved speed of
**data_filtering**and**data_matching**functions (**data_matching**is now based on the*reclin2*package instead of*reclin*). - Improved speed of multilateral index functions:
**geks**,**wgeks**,**geksj**,**geksw**,**geksl**,**geksgl**,**wgeksl**and**wgeksgl**.

- One new function (
*expenditures*) has been added (faster version of*sales*)

- System of weights in the TPD index has been changed. Now it corresponds to the system of weights used in “HICP Guide for Multilateral Methods”.

Improved the speed of operation of all functions for price indices.

- 4 new functions for calculating elasticity of substitution have been
added:
*elasticity*,*elasticity2*,*elasticity_fig*,*elasticity2_fig*.

- a new internal function has been added (
*conversion*). This function provides integer representation of the given text string.

- the following functions have been improved by changing a method for
dealing with categorical variables:
*model_classification*,*data_classifying*. - An existing artificial data set (dataCOICOP) has been change into the real scanner data set
- Some new references have been added (e.g. for
*GEKS-L*,*GEKS-GL*,*GEKS-AQI*,*GEKS-AQU*functions). - A README file has been improved by adding some new example with using ML methods for product classifiction.

- a new function which allows to compare indices with a target price
index was added (
*compare_to_target*)

- some function descriptions have been changed or improved
- set of files.R has been reorganized
- README file and vignette have been extended

- 37 new functions (concerning the
**WGEKS**,**GEKSL**,**WGEKSL**,**GEKS-AQU**,**WGEKS-AQU**,**GEKS-AQI**,**WGEKS-AQI**,**GEKS-GAQI**,**WGEKS-GAQI**indices and its extensions, a new function**compare_distances**)

- 6 small bugs fixed (they concern
**chlowe**,**chgeolowe**,**chyoung**,**chgeoyoung**,**chhybrid**and**chgeohybrid**functions) - data set on
**milk**was corrected and modified

- A data set on milk has beed modified (one new product has beed added) *

- A function
**matched_fig**has been extended by adding a new parameter

- 1 new function (
**data_aggregating**) has beed added. This function aggregates the user’s data frame over time and/or over outlets (retIDs)

- 1 new artificial data set has been added (
*dataAGGR*) to demonstrate the utility of the**data_aggregation**function.

- 2 bugs fixed (they concern
**final_index**and**final_index2**functions)

- 1 new function (
**data_check**) has beed added. This function checks if the user’s data frame is suitable for further price index calculation.

- 2 bugs fixed (they concern
**data_norm**and**unit**functions) - corrected descriptions (e.g.
**model_classification**function)

- Function
**data_norm**(which is crucial for product unit standarization) has beed corrected (the previous version of that function duplicated rows in data frame)

Function

**data_matching()**has been modified and now it is much more faster,Examples concerning

**chain indices**have been modified and now they are less time-consuming while checking,New data set is added (

**dataU**)New functions for scanner data processing are added (

**data_unit**and**data_norm**)

Access to HASP and WISP methods has been added in the

**price_index()**function and now**price_indices()**works correctly,The default value and the meaning of the

**sensitivity**parameter in**data_preparing()**and**model_classification()**functions have been corrected.