NEWS.md

In SynthETIC: Synthetic Experience Tracking Insurance Claims

SynthETIC

SynthETIC 1.1.0

Inclusion of claim_covariates sub-module

• Extends the package by including support for covariates and their impact on claim sizes.

• Includes one new vignette, demonstrating the sub-module and its use-cases.

• Includes five new data objects. The three existing datasets test_claims_object, test_claim_dataset and test_transaction_dataset now also have a version where outputs are impacted by the effect of covariates. A test_covariates_obj and test_covariates_dataset have been included which provide information regarding the specific factors and levels of covariates used in relation to each claim.

Minor improvements and fixes

• Updates citation

SynthETIC 1.0.5

Minor improvements and fixes

• Removes dependency (Suggests) on the poisson package

SynthETIC 1.0.4

Minor improvements and fixes

• Removes dependency (Suggests) on the ChainLadder package

SynthETIC 1.0.3

New features {#new-features-1.0.3}

• Adds plot_transaction_dataset() function for plotting claim development from a payment-level dataset, in addition to the plot.claims method that works only with a claims object.

SynthETIC 1.0.2

Minor improvements and fixes

• Updates citation

• Fixes a bug in the default sampling function of claim_payment_no()

• Fixes the treatment of params_split to allow for trivial params

SynthETIC 1.0.1

New features {#new-features-1.0.1}

• Updates claim_output() to allow an option to adjust the treatment of out-of-bound transactions in tabulation. The previous version (1.0.0) automatically forced all out-of-bound transactions to be paid at the exact end of the maximum development period allowed. This is now set as the default behaviour, but the user can also set adjust = FALSE to see the proportion of payments projected to fall beyond the maximum development period (the "tail").

Minor improvements and fixes

• Updates claim_output() to force adjust for higher aggregate_level. The issue with previous function was that it ignored payments beyond the max development period after aggregation. This is now fixed - either merged to the end DQ, or in a separate tail cell (if adjust = FALSE).

SynthETIC 1.0.0

New features {#new-features-1.0.0}

• Both claim_frequency() and claim_size() now allow users to input a random generation function (by specifying a simfun and setting type = "r"), in addition to cdf inputs (type = "p") allowed by the predecessor version.

• Also improves the simulation efficiency. When a cdf is given, the function will first search for the existence of the corresponding r-function and if it finds one, apply the r-function directly instead of inverse sampling from the cdf.

• Relaxes assumptions for claim_notification() and claim_closure().

• SynthETIC 0.1.0 assumes Weibull and only allows changes to mean and cv.

• The new version relaxes this assumption and allows user to input any sampling distribution through rfun and paramfun.

• Sets the benchmarks in claim_payment_no() function optional (and will only be read if the default simulation function is used).

• claim_payment_no() is now also implemented through rfun and paramfun, instead of the original simulate_no_pmt_function (which works in the same way as rfun but without the functionality to change parameters).

• claim_payment_size() is also implemented through rfun and paramfun, replacing the original simulate_amt_pmt_function.

• New to_SynthETIC() function helps the conversion from externally simulated objects to SynthETIC format for easy integration with other simulation functions/modules.

Minor improvements and fixes

• Fixed a few typos in function documentation.

• claim_output() function is updated to correctly calculate triangles on a higher aggregate level (from square to parallelogram-shaped).

• The package vignette has been updated to reflect all the changes listed above and show more examples where the quantities are simulated from distributions other than the default.

• The GitHub repo address is added to the DESCRIPTION file.

• The following don't affect the users of the package:

• the test_data.R file under data-raw has been updated to reflect the changes listed under the heading "new features".
• the DESCRIPTION file has been updated to include the new reference made in the vignette (e.g. actuar).

SynthETIC documentation built on May 29, 2024, 8:47 a.m.