== '''To Do List''' ==
Use permno as a key for CRSP Use What are the returns of every month to create delist codes redo graphs Pull Compustat stock in the data on Sales, TA, ... for merge with CRSP based on GVKEYset over time
Why are companies delisting, PE? Costs? M&A? Bankruptcy?
== '''Done List''' ==
Use permno as a key for CRSP
Use every month to create delist codes
redo graphs
Pull Compustat data on Sales, TA, ... for merge with CRSP based on GVKEY
Create Graph of trusts, REITs, and other investment vehicles over time