Paul Waddell | University of California, Berkeley (original) (raw)

Papers by Paul Waddell

Models of residential and workplace location choice prevalent in the literature often assume that... more Models of residential and workplace location choice prevalent in the literature often assume that one choice dimension is exogenous to the other. In our view, a broad and uniform assumption that one choice dimension is exogenous and influences the other is too strong to use as the foundation for current behavioral research or applied policy analysis. We seek to examine the interdependence of residence and workplace choices and to develop a novel approach to modeling these choice dependencies. Two problems related to such joint modeling efforts are addressed in this paper. First, through a latent market segment modeling approach, the paper offers a methodology for accommodating different sequential decision-making processes that may be present in the population, i.e., residential location may be chosen first and influence workplace location for one segment and vice versa. Second, the modeling approach offers a means of overcoming the exploding choice set problem when attempting to mo...

ArXiv, 2020

Urban transportation and land use models have used theory and statistical modeling methods to dev... more Urban transportation and land use models have used theory and statistical modeling methods to develop model systems that are useful in planning applications. Machine learning methods have been considered too 'black box', lacking interpretability, and their use has been limited within the land use and transportation modeling literature. We present a use case in which predictive accuracy is of primary importance, and compare the use of random forest regression to multiple regression using ordinary least squares, to predict rents per square foot in the San Francisco Bay Area using a large volume of rental listings scraped from the Craigslist website. We find that we are able to obtain useful predictions from both models using almost exclusively local accessibility variables, though the predictive accuracy of the random forest model is substantially higher.

1 Smartphones have revolutionized transportation for 2 travelers by providing mapping services th... more 1 Smartphones have revolutionized transportation for 2 travelers by providing mapping services that tell users 3 how to get to a specific destination as well as ride4 hailing services that help them get there. However, 5 the data collected from these services are limited in 6 temporal, spatial, or categorical scope. For a vari7 ety of solutions in urban planning, transportation, 8 or healthcare, collecting rich and granular data of 9 human mobility is critical. Yet, there are few end10 to-end, open-source platforms that allow the devel11 opment of human mobility systems (HMS) to collect, 12 access, and leverage these data in a seamless and cus13

This paper explores the development of an integrated urban-ecological simulation framework by lin... more This paper explores the development of an integrated urban-ecological simulation framework by linking two lines of urban and ecological simulation modeling. We propose a framework for linking the UrbanSim Model and the Urban Ecosystem Model, and describe the structure of the proposed approach. The model is object-oriented and links urban actors to ecological processes through a disaggregate spatial structure.

UrbanSim is a tool for use by urban planners and others to help predict future patterns of urban ... more UrbanSim is a tool for use by urban planners and others to help predict future patterns of urban development under different possible input scenarios, over periods of twenty or more years. It should support deliberation and debate on such issues as building new transit systems or freeways, or changing zoning or economic incentives, as well as on broader issues such as sustainable, livable cities, economic vitality, social equity, and environmental preservation. We want stakeholders to be able to consider different scenarios – packages of possible policies and investments – and then, based on these alternatives, model the resulting patterns of urban growth and redevelopment, of transportation usage, and of resource consumption and other environmental impacts.

Urban modelling, traditionally dominated by static equilibrium formulations, has recently seen th... more Urban modelling, traditionally dominated by static equilibrium formulations, has recently seen the emergence of models explicitly addressing the dynamics of urban change. Equilib- rium models assume that urban land use and transpor t converge to equilibrium between sup- ply and demand and focus on comparative static anal ysis of these equilibria. Dynamic mod- els consider the different speeds of processes of u rban change and concentrate on their out- comes over time and the path dependence this implie s. It is becoming more and more appar- ent that without understanding the inherent inertia of different subsystems of cities it is im- possible to assess their likely responses to land u se or transport policies. For instance, it takes many years between decisions to invest in tra nsport projects and their impact on mobil- ity and location decisions of households and firms. Land use policies, such as development constraints, show their effects only after many yea rs, as building stock...

Transportmetrica A: Transport Science, 2021

AIAA AVIATION 2021 FORUM, 2021

Transportation Research Record: Journal of the Transportation Research Board, 2018

GPS-equipped smartphones provide new methods to collect data about travel behavior, including tra... more GPS-equipped smartphones provide new methods to collect data about travel behavior, including travel survey apps that incorporate automated location sensing. Previous approaches to this have involved proprietary or one-off tools that are inconsistent and difficult to evaluate. In contrast, e-mission is an open-source, extensible software platform that consists of ( a) an app for survey participants to install on their Android or iOS smartphones and ( b) cloud-hosted software for managing the collected data. e-mission collects continuous location data, user-initiated annotations, and responses to contextual, platform initiated survey questions. New studies can be set up using the existing University of California, Berkeley, infrastructure with no additional coding, or the platform can be extended for more complex projects. This paper reviews the requirements for smartphone travel data collection, describes the architecture and capabilities of the e-mission platform, and evaluates its...

Journal of Planning Education and Research, 2016

Current sources of data on rental housing—such as the census or commercial databases that focus o... more Current sources of data on rental housing—such as the census or commercial databases that focus on large apartment complexes—do not reflect recent market activity or the full scope of the US rental market. To address this gap, we collected, cleaned, analyzed, mapped, and visualized eleven million Craigslist rental housing listings. The data reveal fine-grained spatial and temporal patterns within and across metropolitan housing markets in the United States. We find that some metropolitan areas have only single-digit percentages of listings below fair market rent. Nontraditional sources of volunteered geographic information offer planners real-time, local-scale estimates of rent and housing characteristics currently lacking in alternative sources, such as census data.

Urban Geography, 1996

ABSTRACT

Computer, Sep 1, 2006

Page 1. COVERFEATURE 0018-9162/06/$20.00 © 2006 IEEE 66 Computer Published by the IEEE Computer S... more Page 1. COVERFEATURE 0018-9162/06/$20.00 © 2006 IEEE 66 Computer Published by the IEEE Computer Society sible. Sophisticated urban simulation models can sup-port such analyses by predicting the long-term effects of alternative policies. ...

Urban Geography, 1993

... In our implementation of the cost-minimizing manufacturing firm's location decision betw... more ... In our implementation of the cost-minimizing manufacturing firm's location decision between employment centers in the ... The broad hypotheses to be tested are that such firms' location reflects systematic selection conditioned ... To do this, we implement the discrete choice model. ...

Proceedings of the 2003 Annual National Conference on Digital Government Research, May 18, 2003

Transportation Research Part B Methodological, Jul 1, 2007

This article was originally published in a journal published by Elsevier, and the attached copy i... more This article was originally published in a journal published by Elsevier, and the attached copy is provided by Elsevier for the author's benefit and for the benefit of the author's institution, for non-commercial research and educational use including without limitation use in instruction at your institution, sending it to specific colleagues that you know, and providing a copy to your institution's administrator.

This study examines the influence of accessibility to different types of employment on single-fam... more This study examines the influence of accessibility to different types of employment on single-family residential property values using hedonic regression analysis. Using tax assessors' property attribute records, regional travel demand model outputs, and real property sales transactions from King County, Washington in 1995 and 1998, a hedonic regression analysis is used to determine whether congested single-occupancy vehicle accessibility indices, specific to different types of employment, are significantly associated with property values. The results show that access to commercial and university uses is positively associated with sale prices, while access to K-12 educational and industrial uses is negatively associated with sale prices.

Urban Geography, May 15, 2013