Elaine: For the 3-year CTPP data product maybe we can pick up some of
the tables the CB is dropping. I do not understand why tables are
getting dropped so soon but table profile SO803 is a nice place to go if
you want composite information on all your resident workers. It is a
profile containing, age, race, relationship, education attainment,
school enrollment, marital status, veteran status, disability status,
residence 1 year ago, place of birth, foreign born, language spoken at
home, commuting, vehicle availability and a few other variables.
"Murakami, Elaine" wrote:
I had an interesting discussion with Alan Pisarski yesterday and
wanted to share some of it with everyone. Alan, along with other
researchers including Dowell Myers at USC, and Evelyn Blumenburg at
UCLA, have examined how time since immigration influences transit mode
choice and vehicle acquisition.
First, lets remember that there are standard tables that the Census
Bureau produces, and there are custom tables done on commission.
The 1990 and 2000 CTPP are custom tabulations. The standard
tabulations come out BEFORE any custom products.
The questions on the ACS form are:
8. Is this person a CITIZEN of the United States?
9. When did this person come to live in the United States? Year
The current ACS standard products, such as profile S0502 use the
specific year in the table:
Entered 2000 or later
Entered 1990 to 1999
Entered before 1990
While this approach can be useful for cohort analysis, it is less
useful for understanding mode choice by time spent in the U.S. For
the CTPP2000, we had the Census Bureau create a variable called
Length of U.S. residence. The CTPP 2000 includes Table1-020
Length of U.S. residence by Means of Transportation to Work.
One way to think about this is to consider year of birth and the
variable age. If a person is born in 1960, and is surveyed in 2005,
their age is tabulated as 45. If they are surveyed in 2010, their age
is tabulated as 50. If the tabulation was by year of birth they
would always show up in the category 1960.
Alan wants to make sure he gets the equivalent of CTPP2000 Table 1-020
with the ACS tabulations, and have it reported for metropolitan areas,
and aggregated by metro areas by population size. So, this is an
opportunity for me to bring up the topic of TABLE DESIGN for the next
CTPP! We plan for the first product of the next CTPP to use the first
three years of ACS data (2005/2006/2007). The tabulation will be
limited to geographic units with population over 20,000.
Also, Phil Salopek has already submitted a list of tables to be
deleted from the ACS standard set. This includes profile S0803, and
tables of travel time by marital status, travel time by educational
attainment, and travel time by household type. He also had travel
time by race and ethnicity on the list for deletions, but I asked if
he could retain them as they are useful for projects on environmental
justice. IF THERE ARE SPECIFIC TABLES (particularly those related to
journey to work and vehicle availability) that you MUST have as part
of the ACS standard set, please let me know ASAP, so that we can
convey this to the CB.
If there are tables that you especially want for the first CTPP
product, please convey those ideas as well. On MY list for the first
CTPP product are:
County-to-County flow tabulation (total, and by means of
transportation to work)
PUMA-to-PUMA flow tabulation (total and by means of transportation to
However, for flow tabulations from ACS, we need to make sure that the
workplace allocation program is in place to assign detailed workplace
geocoding to respondents who do not supply sufficient information on
their ACS form.
Finally, for those of you who do not already know, Phil Salopek will
be retiring from the U.S. Census Bureau on March 2. He has been a
great help to all of us in the transportation data community and we
wish him well in his new endeavors, and we hope that he will find a
way to continue to work with us!
On behalf of the CTPP Team:
19900 Governors Dr
Olympia Fields, IL 60461