optimize_effect_2

optimize_effect

Given an object with the linear programming problem set up, compute the bounds
using rcdd. Bounds are returned as text but can
be converted to R functions using interpret_bounds, or latex code using
latex_bounds.

When causal quantities are not identifiable from the observed data, it still may be possible
to bound these quantities using the observed data. We outline a class of problems for which the
derivation of tight bounds is always a linear programming problem and can therefore, at least
theoretically, be solved using a symbolic linear optimizer. We extend and generalize the
approach of Balke and Pearl (1994) <doi:10.1016/B978-1-55860-332-5.50011-0> and we provide
a user friendly graphical interface for setting up such problems via directed acyclic
graphs (DAG), which only allow for problems within this class to be depicted. The user can
then define linear constraints to further refine their assumptions to meet their specific
problem, and then specify a causal query using a text interface. The program converts this
user defined DAG, query, and constraints, and returns tight bounds. The bounds can be
converted to R functions to evaluate them for specific datasets, and to latex code for
publication. The methods and proofs of tightness and validity of the bounds are described in
a paper by Sachs, Jonzon, Gabriel, and Sjölander (2022)
<doi:10.1080/10618600.2022.2071905>.

Michael Sachs

causaloptim

An Interface to Specify Causal Graphs and Compute Bounds on
Causal Effects

Michael C Sachs

Erin E Gabriel

Arvid Sjölander

Gustav Jonzon

Alexander A Balke

Colorado Reed

optimize_effect_2 function

<dl><dt>obj</dt>
<dd>Object as returned by analyze_graph or create_linearcausalproblem</dd></dl>

Arguments

Run the optimizer to obtain symbolic bounds — optimize_effect_2

<dl>

<dt>obj</dt>
<dd>Object as returned by analyze_graph or create_linearcausalproblem</dd>

</dl>

optimize_effect_2: Run the optimizer to obtain symbolic bounds

Description

Usage

Value

Arguments

Examples