How long after a recession has begun does it typically take the NBER to announce the recession's start date?
a. Between 4 and 21 days
b. Between 4 and 21 weeks
c. Between 4 and 21 months
d. Between 4 and 21 years
a. Between 4 and 21 days
b. Between 4 and 21 weeks
c. Between 4 and 21 months
d. Between 4 and 21 years