published journal article
working paper
Recent survey validation studies suggest that measurement error in earnings data is pervasive and violates classical measurement error assumptions, and therefore may bias estimation of cross-section and longitudinal earnings models. We model the structure of earnings measurement error using data from the Panel Study of Income Dynamics Validation Study (PSDIVS). We then use Rubin’s (1987) multiple imputation techniques to estimate consistent earnings equations under non-classical earnings measurement error in the PSID. Our technique is readily generalized, and the empirical results demonstrate the potential importance of correcting for measurement error in earnings and related data, particularly during recessions.
published journal article
conference paper
published journal article
working paper
A three-year experiment is underway in San Diego County, California that allows solo drivers to pay a fee to use “Express Lanes” i.e. carpool lanes to avoid an eighty-mile highly congested stretch of freeway. These lanes are also commonly referred to as High Occupancy Toll (HOT) Lanes. The facility has two reversible lanes in the freeway median separated by concrete barriers from the I-15 main lanes with access available only at the two end points. Tolls charged commonly range from $.50 to $4.00 per trip but in exceptionally congested conditions can go as high as $8. Fees charged can change dynamically every six minutes to reflect changing traffic in the carpool lanes. Changeable message signs post the price. The algorithm controlling the prices is adjusted to maintain free flow conditions in the carpool lanes at all times. Carpools of two or more persons retain free travel. Subscribers who chose to use the lanes are charged the posted toll using transponder technology and monthly credit-card billing. The opening hours for the Express Lanes are 5:45 to 9:15 a.m. inbound to San Diego and 3:00 – 7:00 p.m. outbound from San Diego.
published journal article
This paper generalizes the simple two-city work-from-home model of Brueckner et al. (2022) by adding a group of non-remote workers, who must live in the city where they work. The results show that the main qualitative conclusions of BKL regarding the intercity effects of WFH are unaffected by this modification, with WFH yielding the same aggregate population and employment changes in the two cities and the same house-price and wage effects as in the simpler model. Even though the aggregate population effects are the same, the population relocation of non-remote workers is in the opposite direction to that of remote workers, which matches the direction in BKL. These conclusions are useful because they establish the robustness of BKL’s highly parsimonious model. The paper also contains material surveying other theoretical research on WFH as well as empirical work in the area, including BKL’s empirical findings in support of their model.
published journal article
The goal of this study was to analyze the impact of private autonomous vehicles (PAVs), specifically their near-activity location travel patterns, on vehicle miles traveled (VMT). The study proposes an integrated mode choice and simulation-based parking assignment model, along with an iterative solution approach, to analyze the impacts of PAVs on VMT, mode choice, parking lot usage, and other system performance measures. The dynamic simulation-based parking assignment model determines the parking location choice of each traveler as a function of the spatial–temporal demand for parking from the mode choice model, whereas the multinomial logit mode choice model determines mode splits based on the costs and service quality of each travel mode coming, in part, from the parking assignment model. The paper presents a case study to illustrate the power of the modeling framework. The case study varies the percentage of persons with a private vehicle (PV) who own a PAV versus a private conventional vehicle (PCV). The results indicated that PAV owners traveled an extra 0.11 to 1.51 mi compared with PCV owners on average, and the PV mode share was significantly higher for PAV owners. Therefore, as PCVs are converted into PAVs in the future, the results indicate substantial increases in VMT near activity destinations. However, the results also indicated that adjusting parking fees and redistributing parking lot capacities could reduce VMT. The significant increase in VMT from PAVs implies that planners should develop policies to reduce PAV deadheading miles near activity locations, as the automated era comes closer.
published journal article |
Jan 2025
published journal article |
Sep 2023
published journal article
conference paper