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Transportation Spending by Low-Income California Households ...

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households with and without children (5 percentage points). Above, we<br />

mentioned that the transportation expenditures of higher-income<br />

households appear to be less sensitive than the transportation<br />

expenditures of low-income households to the presence of children; here<br />

we see that the same is true of vehicle use rates as well.<br />

Using PUMS data, we found that differences in vehicle ownership<br />

rates between low-income households with and without children<br />

persisted even after we controlled for the age of the householder. We<br />

also found that car ownership rates differed very little <strong>by</strong> the age of the<br />

head of householder within each income subgroup. Car ownership rates<br />

for low-income households with children differed <strong>by</strong> a maximum of 3<br />

percentage points between the age categories, and similar results were<br />

obtained for the low-income households without children. 11 We also<br />

looked for differences in expenditures based on the number and age of<br />

the children in the household but did not find any strong patterns<br />

related to these factors. Somewhat surprisingly, we found that the<br />

number of children did not have any statistically measurable effect on<br />

transportation expenditures. The age of the children had no effect<br />

either, except for households with children over age 18, which had<br />

somewhat higher expenditures.<br />

<strong>Transportation</strong> expenditure data from the Consumer Expenditure<br />

Survey do not permit us to isolate work-related expenditures from<br />

nonwork-related expenditures, but we find some evidence that<br />

expenditures are higher for employed households. One might expect to<br />

see higher transportation expenditures when there are more employed<br />

adults in a household because most employed adults commute and<br />

unemployed adults do not, although this difference may be offset <strong>by</strong> job<br />

search trips <strong>by</strong> the unemployed. <strong>Households</strong> with fewer employed adults<br />

may also make fewer trips simply because their income is lower and they<br />

have less to spend on transportation.<br />

The dollar amount of transportation expenditures is much lower for<br />

households with no earners than for households with any earners (Table<br />

3.9). However, the number of employed adults in households with<br />

earners does not seem to have much further effect on the dollar amount<br />

_____________<br />

11 See the bottom of Table 5.13 for details.<br />

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