How emergency managers (mis?)interpret forecasts.

Emergency managers who work on floods and other weather-related hazards constitute critical frontline responders to disasters. Yet, while these professionals operate in a realm rife with uncertainty related to forecasts and other unknowns, the influence of uncertainty on their decision-making is poorly understood. Consequently, a national-level survey of county emergency managers in the United States was administered to examine how they interpret forecast information, using hypothetical climate, flood, and weather scenarios to simulate their responses to uncertain information. The study revealed that even emergency managers with substantial experience take decision shortcuts and make biased choices, just as do members of the general population. Their choices vary depending on such features as the format in which probabilistic forecasts are presented and whether outcomes are represented as gains or losses. In sum, forecast producers who consider these decision processes when developing and communicating forecasts could help to improve flood preparation and potentially reduce disaster losses.

The dynamic nature of risk perceptions after a fatal transit accident.

In 2009, two trains of Washington, DC's Metrorail system collided, resulting in nine deaths and 50 serious injuries. Based on a multiwave survey of Metrorail users in the months after the crash, this article reports how the accident appears to have (1) changed over time the tradeoffs among safety, speed, frequency of service, cost, and reliability that the transit users stated they were willing to make in the postaccident period and (2) altered transit users' concerns about safety as a function of time and distance from the accident site. We employ conditional logit models to examine tradeoffs among stated preferences for system performance measures after the accident, as well as the influence that respondent characteristics of transit use, location, income, age, and gender have on these preference tradeoffs. As expected, respondents appear averse to longer headways between trains, longer travel durations, higher travel costs, a higher number of late trains, and a higher number of fatalities. The models also show evidence of higher aversion to fatalities from transit system operation among females compared to males. In addition, respondents less experienced with Metrorail travel and those with lower household incomes show higher aversion to fatalities, and this aversion increases as a subject's psychological distance from the accident site decreases. Contrary to expectations shaped by previous studies, aversion to fatalities appears to have increased between the early months after the accident and the end of the survey period, and the expected relationship between age and aversion to fatalities is not statistically significant.

Turning brownfields into greenspaces: examining incentives and barriers to revitalization.

This study employs interviews, document review, and a national survey of local government officials to investigate the factors that influence the success of efforts to convert underutilized contaminated properties into greenspace. We find that the presence of contamination continues to be a concern despite federal and state efforts to ease liability fears but also that site and project features can overcome this hurdle. In particular, jurisdictions appear more likely to convert distressed properties into greenspace if recreational parks, rather than open space, are planned, sites are already owned rather than available only through tax foreclosure, and the state is perceived as being supportive of the conversion. In addition, mixed public-private funding and site locations in residential areas are more likely to attract community support for conversion projects.