2. Some of the principal conceptual elements needed in developing a theory for the structure and growth of
residential areas are discussed.
Viewed as interdependent forms of behavior, activities and movements provide very fundamental insights into
land use and transportation decisions. Classes of residential household activities are described
The identification of household types is based on distinctive differences in lifestyles as defined by
socioeconomic status and activity mixes.
A model must synthetically represent the activity patterns of households in the city.
This model must be based on the notion of a time budget in which special attention is given to the allocation
of time to various activities for varying classes of households
In the analysis time allocation, model splits, between discretionary-nondiscretionary uses of time, the in-
home and out-of-home uses of time are investigated.
Time, frequency, and spatial distribution of household activities are determined through survey research
3. A continuous sampling survey focusing on activities and movements of residents and related attitudes should
be designed.
Present residential land use models present an aggregative representation of the residential growth process.
Work is now under way on a second generation set of models which sub aggregates this process into two
stages:
1. In which the developer acquires land, subdivides, and builds dwelling units and thus adds to the housing
inventory, and
2. The household shops for a home from the inventory thus supplied.
4. The first is called a producer-type model, and the second a consumer-type model. The consumer class of
models should operate on the output of the producer class of models. The consumer model involves these
major locating variables:
i. The price-rent level in relation to the household budget,
ii. The activity requirements of the household, and
iii. The tastes of the household with respect to the dwelling unit, its internal characteristics, and the
surrounding social and physical environment at that location.
The conceptual elements identified appeared to fit in a systems approach to modeling household activities and
residential development processes.