Update 'Concept paper 2022 02 09'

Concept-paper-2022-02-09.md

@@ -32,14 +32,22 @@ This would use the IND or similar data to build the list of phase transitions.
 ### Design tradeoffs
 Some design tradeoffs include
 
-- Normalized or non-normalized transition paths? I'm particularly interested in inclucing mixed-phase paths.
+- Normalized or non-normalized transition paths? I'm particularly interested in inclucing mixed-phase paths, i.e. non-normalized paths.
 
 ## Overall Model 
 
-Overall this would allow me to construct a probabalistic description of passing through the d
+Overall this would allow me to construct a probabalistic description of passing through the trials portion of the R&D pipeline.
+The probabalistic model could then be used to answer various questions, including causal/structural questions.
+It would also be straightforward to develop simulations from this approach, as the probabilities are right there.
 
 # Estimation Strategy
-Probably use a non-parametric bayesian approach to estimating the probability densities.
+Probably use a non-parametric bayesian approach to estimating the probability densities?
 
 ## Identification Strategy
 
+### Descriptive identification
+
+
+### Causal Identification
+Not of interest right now.
+