Figure 1.
Transition probability model, showing the probability of remaining in a state or moving to another state during specific time intervals (such as one year).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.