News aggregation—or the process of taking news from published sources, reshaping it, and republishing it in an abbreviated form within a single place—has become one of the most prominent journalistic practices in the current digital news environment. It has long been an important part of journalism, predating reporting as a form of newsgathering and distribution. But it has often been a poorly, or at best incompletely, understood practice. Aggregation was widespread in the 18th and 19th centuries through copying and republishing of newspaper articles in ways that sometimes showed little regard for copyright or individual authorship. But in recent decades, more sophisticated forms of aggregation have proliferated, both automated and manual, and on virtually every digital platform on which news is disseminated. Aggregation draws from the norms and values of both modern professional journalism and Internet culture and writing. That amalgam of standards and practices shapes aggregation as a hybrid practice that is built on professional journalism yet marginal within it. News aggregators’ economic effect on the online news marketplace has been intensely debated, but research has shown them to be generally helpful to the news sites they aggregate from, expanding the news ecosystem and sending readers through hyperlinks. Their legal legitimacy has also come under scrutiny, though they have encountered significantly more restrictions in Europe than in the United States or elsewhere. Professionally, aggregation is built on the practices of reporting and relies on reporting as both the predominant source of its information and the blueprint for its methods of verification. But its defining characteristic is its secondary status relative to reporting, which shapes its methods of gathering evidence as well as its professional identity and values. Overall, news aggregation plays a growing role in the contemporary news environment, though its influence is complex, multifaceted, and ambiguous.
Health status measurement issues arise across a wide spectrum of applications in empirical health economics research as well as in public policy, clinical, and regulatory contexts. It is fitting that economists and other researchers working in these domains devote scientific attention to the measurement of those phenomena most central to their investigations. While often accepted and used uncritically, the particular measures of health status used in empirical investigations can have sometimes subtle but nonetheless important implications for research findings and policy action. How health is characterized and measured at the individual level and how such individual-level measures are summarized to characterize the health of groups and populations are entwined considerations. Such measurement issues have become increasingly salient given the wealth of health data available from population surveys, administrative sources, and clinical records in which researchers may be confronted with competing options for how they go about characterizing and measuring health. While recent work in health economics has seen significant advances in the econometric methods used to estimate and interpret quantities like treatment effects, the literature has seen less focus on some of the central measurement issues necessarily involved in such exercises. As such, increased attention ought to be devoted to measuring and understanding health status concepts that are relevant to decision makers’ objectives as opposed to those that are merely statistically convenient.
George J. Flynn
Scattered sunlight from interplanetary dust particles, mostly produced by comets and asteroids, orbiting the Sun are visible at dusk or dawn as the Zodiacal Cloud. Impacts onto the space-exposed surfaces of Earth-orbiting satellites indicate that, in the current era, thousands of tons of interplanetary dust enters the Earth’s atmosphere every year. Some particles vaporize forming meteors while others survive atmospheric deceleration and settle to the surface of the Earth. NASA has collected interplanetary dust particles from the Earth’s stratosphere using high-altitude aircraft since the mid-1970s. Detailed characterization of these particles shows that some are unique samples of Solar System and presolar material, never affected by the aqueous and thermal processing that overprints the record of formation from the Solar Protoplanetary Disk in the meteorites. These particles preserve the record of grain and dust formation from the disk. This record suggests that many of the crystalline minerals, dominated by crystalline silicates (olivine and pyroxene) and Fe-sulfides, condensed from gas in the inner Solar System and were then transported outward to the colder outer Solar System where carbon-bearing ices condensed on the surfaces of the grains. Irradiation by solar ultraviolet light and cosmic rays produced thin organic coatings on the grain surfaces that likely aided in grain sticking, forming the first dust particles of the Solar System. This continuous, planet-wide rain of interplanetary dust particles can be monitored by the accumulation of 3He, implanted into the interplanetary dust particles by the Solar Wind while they were in space, in oceanic sediments. The interplanetary dust, which is rich in organic carbon, may have contributed important pre-biotic organic matter important to the development of life to the surface of the early Earth.
Brenda L. Berkelaar and Millie A. Harrison
Information visibility refers to the degree to which information is available and accessible. Availability focuses on whether people could acquire particular information if they wanted. Accessibility focuses on the effort needed to acquire available information. In scholarly, industry, and popular press, people often conflate information visibility with transparency, yet transparency is generally a valued or ideological concept, whereas visibility is an empirical concept. Growing interest in studying and managing information visibility corresponds with the rapid growth in the use of digital, networked technologies. Yet, interest in information visibility existed prior to the introduction of networked information and communication technologies. Research has historically focused on information visibility as a form of social control and as a tool to increase individual, organizational, and social control and coordination. As a research area, information visibility ties to classic communication and interdisciplinary concerns, as well as core concerns of contemporary society including privacy, surveillance, transparency, accountability, democracy, secrecy, coordination, control, and efficiency. An emerging research area with deep historical roots, information visibility offers a promising avenue for future research.
Information is of great value to politicians, who make decisions with uncertain consequences and want to convince the public and their political counterparts of the validity of their proposals. Because of conflicting interests and ideal views, information is not easily shared among political agents. However, information aggregation is collectively valuable, because it leads to better decision-making and facilitates defusing conflicts. Formal theorists investigate some of the institutions used to aggregate information among political agents. There are several studies on committee decision-making. They establish that rational voters do not make voting choices using only their individual information. This complicates information aggregation, especially when high quorum voting rules are adopted. However, deliberation may restore efficient information aggregation. In the case of homogeneous committees, strategic incentives for information acquisition are optimized by a decision mechanism based on random sequential individual consultations. The fundamental characteristic of committees is that all decisions are made jointly. An early 21st-century surge of formal studies on information aggregation considers the “opposite case” of information exchange among political entities that make decisions independently of each other. These articles deliver insights on topics as diverse as the optimal organization of meetings, the benefit of cabinet governments, the shape of political and social networks, and the value of engagement of societal groups. The breadth of these results is a testimony to the success and promise of this methodology. Of great importance for international conflict avoidance is building and maintaining trust among states and non-state entities. Formal analysis of international conflict management institutions such as standard diplomatic communications, peace summits, and third-party intermediation clarifies that, while none of these institutions fully prevent war, they are all useful to aggregate information, build trust, and facilitate peaceful agreements. Even communication through standard diplomatic channels and public announcements may significantly reduce the risk that disputes evolve into conflicts. Third-party intermediation is more effective, even if mediators are not endowed with the power to enforce their settlement proposals.
Janice Gross Stein
Analysis of the use of prospect theory since the mid-1980s identifies significant impact on research on important puzzles in international security and international political economy. Research since the mid-1990s has identified the scope conditions of framing effects, loss aversion, and patterns of probability estimation on international behavior. New research using multiple methods has strengthened the validity of findings on the impact of framing effects and loss aversion under different conditions. Future research opportunities for psychological explanations of international behavior are identified.