Update 'Concept paper 2022 02 09'

Concept-paper-2022-02-09.md

@@ -15,7 +15,12 @@ I think I can get two, maybe three, papers out of this:
 
 Attempt to build a "cannonical" probabalistic model of the clinical trials process, which will allow for a simple way to test hypotheses regarding the impact of policies and practices on drug development.
 
-### Desired Attributes
+### Distinguishing features
+
+- Estimation is contingent on expectations at the beginning of a trial.
+- Estimation targets are conditional probability functions/distributions.
+
+### Desired Attributes of finished project
 
 - straightforward to re-estimate model and add extensions.
 - [Data Processing](https://gitea.kgjk.icu/Research/ClinicalTrialsDataProcessing) is separate and mostly automated.
@@ -106,9 +111,10 @@ The goal is to estimate
 
 ## Identification Strategies
 
+Below is a list of challenges to identification and how to overcome them.
+
 ### Descriptive identification
 
 
 ### Causal Identification
-Not of interest right now.