Due to the economic importance of the position auctions used by search engines to sell advertising, these auctions have received considerable recent study. However, most of this study has been analytic, and these analyses have relied on strong assumptions about the structure of the setting. In this paper, we show that it is feasible to perform computational equilibrium analyses of complex, real...

In sponsored search auctions advertisers typically pay a fixed amount per click that their advertisements receive. In particular, the advertiser and the publisher enter into a contract (e.g., the publisher displays the ad; the advertiser pays the publisher 10 cents per click), and each party’s subjective value for such a contract depends on their estimated click-through rates (CTR) for the ad. ...

The accurate user click behavior identification is the precondition of web user behavior characters researching, but the growing complexity of web page makes it difficult to be identified. In this paper, a novel method to identify user click behavior is proposed and implemented. First, the sequence of user HTTP requests is described through hidden semi-Markov model, which is then computed into ...

Personalized search has recently attracted increasing attention. This paper focuses on utilizing click-through data to personalize the web search results, from a novel perspective based on subspace projection. Specifically, we represent a user profile as a vector subspace spanned by a basis generated from a word-correlation matrix, which is able to capture the dependencies between words in the ...

This paper presents models for predicted click-through rates in position auctions that take into account the externalities ads shown in other positions may impose on the probability that an ad in a particular position receives a click. We present a general axiomatic methodology for how click probabilities are affected by the qualities of the ads in the other positions, and illustrate that using...

The biocompatibility of a triazole mimic of the DNA phosphodiester linkage in Escherichia coli has been evaluated. The requirement for selective pressure on the click-containing gene was probed via a plasmid containing click DNA backbone linkages in each strand of the gene encoding the fluorescent protein mCherry. The effect of proximity of the click linkers on their biocompatibility was also p...

Fifteen patients with midsystolic clicks associated with mitral valve prolapse were studied in order to assess changed in ausculatatory findings produced by pacing-induced variations in cardiac rate, rhythm, and conduction. As the heart rate was increased in stepwise intervals to the maximum possible extent by right atrial pacing (RAP) in 14 patients, the interval between the Q wave and the cli...

This study provides an approach to manage an on-going Internet ad campaign that substantially improves the number of clicks and the revenue earned from clicks. The problem we study is faced by an Internet advertising firm (Chitika) that operates in the Boston area. Chitika contracts with publishers to place relevant advertisements (ads) over a specified period on publisher websites. Ad revenue ...

36 Perception of the temporal structure of acoustic signals contributes critically to vocal 37 signaling. In the aquatic clawed frog Xenopus laevis, calls differ primarily in the 38 temporal parameter of click rate, which conveys sexual identity and reproductive state. 39 We show here that an ensemble of auditory neurons in the laminar nucleus of the torus 40 semicircularis (TS) of X. laevis sp...

Many sounds in the environment, including speech, are temporally dynamic. The auditory brainstem is exquisitely sensitive to temporal features of the incoming acoustic stream, and by varying the speed of presentation of these auditory signals it is possible to investigate the precision with which temporal cues are represented at a subcortical level. Therefore, to determine the effects of stimul...