We present a dynamic model of "scal policy in a simple growth framework where social polarization (of preferences) plays a central role in the evolution of "scal instability and growth collapse. In a highly polarized society, a de"cit occurs endogenously, "scal spending path becomes more volatile, output collapses, and economic growth rate is reduced along the transition path to a new lower lev...

BACKGROUND Chronic social instability during adolescence and early adulthood is known to produce a variety of long-lasting effects that may contribute to future psychiatric disorders. However, its potential to affect future generations has not been tested. METHODS Female and male mice were exposed to chronic social stress involving social instability and disruption of social hierarchy from po...

The affect infusion model [Forgas, 1999, Handbook of Cognition and Emotion. Wiley, Chichester, p. 591] was used to hypothesize and explain relations between respondents’ moods and the instability of survey measurements of social support ties in social networks of high school students. Two relative measures of network measurement instability were defined. The sensitivity of these to the change i...

Title of Dissertation: STATE INSTABILITY AND TERRORISM Susan Fahey, Doctor of Philosophy, 2010 Dissertation directed by: Professor Gary LaFree Department of Criminology and Criminal Justice I explore the relationship between political instability and terrorism in this dissertation, using the Global Terrorism Database (GTD), which contains both domestic and transnational terrorism. I use the Pol...

Language change is paradoxical: Children acquire their native language accurately, yet over time, the language can change. Some changes may be attributed to an external event, such as political upheaval, but not every instance of language change seems to have an external cause. A possible resolution to this paradox comes from the facts that (1) spoken language has inherent variation and (2) chi...

We develop a new stochastic model of language learning and change that incorporates variable speech and age structure. Children detect correlations between age and speech, predict how the language is changing, and speak according to that prediction. Although the population tends to be dominated by one idealized grammar or another, the learning process amplifies chance correlation between age an...