Three data stes used in chapter 4 are also used earlier:
'd.ibmvwewsp6203' is used in chapter 1, and 'm.3m4697' and 'q.gnp4791'
are used in chapter 2; these three data objects are docuemented in
'ch01data' or 'ch02data'.
The other data sets used in chapter 4 are as follows:
m.unrate
zoo object giving the monthly US civilian unemployment rate from
1948 through 2004.
w.3mtbs7097
zoo object giving the US weekly 3-month treasury bill rate in the
secondary market from 1970 through 1997.
m.ibmln2699
zoo object giving the monthly log returns in percentages of IBM
stock from 1926 through 1999.
q.unemrate
zoo object giving the US quarterly unemployment rate seasonally
adjusted from 1948 through 1993.