TODO

[LukaszChrostowski]

Issues to consider for the current version of the package.

To develop (SHORT TERM):

• add pop_totals / pop_means for variable selection method
• add the rest of the estimation methods gee / mle provided after variable selection
• provide bias minimization method to the base usage of the package
• accelerate performance for variable selection algorithm written in C++
• structural changes, such as equal model.frame call for all models and one function for models with and without variable selection
• Ability to call functions for several outcome variables e.g. y1 + y2 + ... + yk ~ x1 + x2 + x3 + ... + xn
• add trace/verbose tracking for variable selection and bootstrap algorithms
• move bias correction definition to the other control function or consider another way to define it
• change functions name in OutcomeMethods
• fix BIC.nonprobsvy in summary
• change the structure of defining gee with h functions in control_selection
• add error message in case of duplicates of outcome variables in formula
• add error message in case of badly defined formulas
• add propensity score adjustment using xgboost model.
• add svrep (bootstrap weighting) to the functionality of the package.
• add div to variable selection models

To develop (LONG TERM):

• variance for DR estimator when MI estimation using NN algorithm
• method to estimate mean/median/totals in subsets/groups (called on the nonprobsvy object).
• variance for MI estimator when MI using PMM imputation

To fix:

• weights for non-probability sample - not stable algorithm during estimation (overestimation of propensity weights or errors in maxLik model)
• variance for DR and MI estimator (with NN)

[Kertoo]

add propensity score adjustment using xgboost model.

Fitting more complicated machine learning models (such as xgboost ) is more involved than just calling lm/glm with avoiding overfitting etc. and adding a plethora of minor tweaks. Maybe it would just be better to create a method where user supplies a fitted ML object instead of calling xgboost internally? This would make tuning the model much less tedious.

[LukaszChrostowski]

tasks moved to #47