== '''To Do List''' ==
Create Graph of trusts, REITs, and other investment vehicles over timeUse permno as a key for CRSP Use every month to create delist codes
IPOs per yearredo graphs
Pull Compustat data on Sales, TA, ... for merge with CRSP based on GVKEY
== '''Done List''' ==
Create Graph of trusts, REITs, and other investment vehicles over time
IPOs per year
Add stock ownership code to data