We propose a variation of the SO-PMI algorithm for Japanese, for use in Weblog Opinion Mining. SO-PMI is an unsupervised approach proposed by Turney that has been shown to work well for English. We first used the SO-PMI algorithm on Japanese in a way very similar to Turney’s original idea. The result of this trial leaned heavily toward positive opinions. We then expanded the reference words to ...

S proper scoring rules continue to play an important role in probability assessment. Although many such rules have been developed, relatively little guidance exists as to which rule is the most appropriate. In this paper, we discuss two important properties of quadratic, spherical, and logarithmic scoring rules. From an ex post perspective, we compare their rank order properties and conclude th...

This paper examines the phonetic and phonological properties of the last pitch accent in Catalan single and multi-stressed neutral declaratives. Traditionally, the different F0 patterns observed in single stressed structures (clear F0 peak) and in multistressed structures (progressively falling slope or a strongly lowered F0 peak) have been subject to different phonological interpretations (H* ...

Let X be an IR-valued continuous semimartingale, T a fixed time horizon and Θ the space of all IR-valued predictable X-integrable processes such that the stochastic integral G(θ) = ∫ θdX is a square-integrable semimartingale. A recent paper of Delbaen/Monat/Schachermayer/Schweizer/Stricker (1996) gives necessary and sufficient conditions on X for GT (Θ) to be closed in L(P ). In this paper, we ...

The standard regenerative method for estimating steady-state parameters is extended to permit cycles which begin and end in diierent states. This result is established using the Dynkin martingale and a related solution to Poisson's equation. We compare the variance constant which appears in the associated central limit theorem with that arising from cycles that begin and end in the same state. ...

where m is the Lebesgue measure of R, has a fixed density f∗. This fixed density gives rise to a physical measure of S, which describes the asymptotic behavior of the chaotic orbits from the statistical viewpoint [3]. Our purpose is efficient computation of such fixed densities. In his book [6], Ulam proposed a piecewise constant approximation method to calculate the fixed density f∗ and conjec...

We prove a version of First Fundamental Theorem of Asset Pricing under transaction costs for discrete-time markets with dividend-paying securities. Specifically, we show that the no-arbitrage condition under the efficient friction assumption is equivalent to the existence of a risk-neutral measure. We derive dual representations for the superhedging ask and subhedging bid price processes of a c...

Let L be a multidimensional Lévy process under P in its own filtration. The f-minimal martingale measure Qq is defined as that equivalent local martingale measure for E(L) which minimizes the f-divergence E [ (dQ/dP ) ] for fixed q ∈ (−∞, 0) ∪ (1,∞). We give necessary and sufficient conditions for the existence of Qq and an explicit formula for its density. For q = 2, we relate the sufficient c...

The aim herein is to analyze utility-based prices and hedging strategies. The analysis is based on an explicitly solved example of a European claim written on a nontraded asset, in a model where risk preferences are exponential, and the traded and nontraded asset are diffusion processes with, respectively, lognormal and arbitrary dynamics. Our results show that a nonlinear pricing rule emerges ...

1 Preliminaries on monoids Definition 1.1. An Abelian monoid is a set with a binary, associative, and commutative operation which has a neutral element. It will often be called just a monoid in this manuscript because we will not deal with non-commutative monoids. A monoid M is called • finitely generated if there is a finite set of generators, or equivalently if there is a surjection of monoid...