An example of a natural experiment occurred in Helena, Montana during the six-month period from June 2002 to December 2002 when a smoking ban was in effect in all public spaces in Helena including bars and restaurants.
A master's degree in finance can be earned in one to two years or less after completing a bachelor's program. Doctorate programs with a focus on finance take approximately four to six years to complete and require at least a bachelor's degree--though a master's degree is a more common requirement.
A bachelor's degree in the same field would take up to 4 years, whereas a master's degree can be earned in 1 or 2 years, after finishing your bachelors. If you wish to go for a doctoral level education with focus on finance, you will need around 4 to 8 years to complete the program.