Implicit memory tests often reveal facilitated processing of previously encountered stimuli even when they cannot be explicitly retrieved. For example, despite decrements in recognition memory, priming in healthy older adults is often comparable in magnitude to that in young individuals. Such observations are commonly taken as evidence for independent explicit and implicit memory systems. On a ...

For a scalar or vector parameter of interest with a regular statistical model, we determine the definitive null density for testing a particular value of the interest parameter: continuity gives uniqueness without reference to sufficiency but the use of full available information is presumed. We start with an exponential family model, that may be either the original model or an approximation to...

We apply the two-pluyer game assumprio~ls of 1i111ited search horizon and cornn~itnrent to nroves i constant time, to .single-agent heuristic search problems. We present a varicrtion of nrinimcr lookuhead search, and an analog to ulphu-betu pruning rlrot signijicantly improves the efficiency c. the algorithm. Paradoxically. the search horizon reachuble with this algorithm increases wir. increus...

The apparent banking market failure modeled by Diamond and Dybvig [1983] rests on their inconsistently applying their " sequential servicing constraint " to private banks but not to their government deposit insurance agency. Without this inconsistency, banks can provide optimal risk-sharing without tax-based deposit insurance, even when the number of " type 1 " agents is stochastic, by employin...

This chapter is a quick review of the theory of semimartingales, these processes being those for which statistical methods are considered in this book. A process is a collection X = (Xt) of random variables with values in the Euclidean space R for some integer d ≥ 1, and indexed on the half line R+ = [0,∞), or a subinterval of R+, typically [0, T ] for some real T > 0. The distinctive feature h...

An issue of interest to work in areas ranging from lexical semantics to natural language processing (especially automatic text generation) to language pedagogy is the semantics of degree modification by expressions like very, well, and much. Focusing on the case of deverbal gradable adjectives (such as acquainted), we show that the selective behavior of different degree modifiers provides an im...

This R (R Development Core Team, 2011) package contains software designed to recover latent dimensions (i.e. a basic space) from a numeric matrix of data. The initial development was conducted by Poole (1998), who wrote the Fortran executable that was previously used by social scientists to analyze survey data in publications such as Saiegh (2009) and Abrajano and Poole (2011). The principal pu...

Spatial information plays an important role in the identification of sources of outbreaks for many different health-related conditions. In the public health domain, as in many other domains, the available data is often aggregated into geographical regions, such as zip codes or municipalities. In this paper we study the problem of finding clusters in spatially aggregated data. Given a subdivisio...