Copula modeling enables the analysis of multivariate count data that has previously required imposition of potentially undesirable correlation restrictions or has limited…
Abstract
Copula modeling enables the analysis of multivariate count data that has previously required imposition of potentially undesirable correlation restrictions or has limited attention to models with only a few outcomes. This article presents a method for analyzing correlated counts that is appealing because it retains well-known marginal distributions for each response while simultaneously allowing for flexible correlations among the outcomes. The proposed framework extends the applicability of the method to settings with high-dimensional outcomes and provides an efficient simulation method to generate the correlation matrix in a single step. Another open problem that is tackled is that of model comparison. In particular, the article presents techniques for estimating marginal likelihoods and Bayes factors in copula models. The methodology is implemented in a study of the joint behavior of four categories of US technology patents. The results reveal that patent counts exhibit high levels of correlation among categories and that joint modeling is crucial for eliciting the interactions among these variables.
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ONE of the pressing problems that faces the public librarian of to‐day is the finding of adequate protection for the property committed to his care. The open‐access library loses…
Abstract
ONE of the pressing problems that faces the public librarian of to‐day is the finding of adequate protection for the property committed to his care. The open‐access library loses books; at any rate now‐a‐days. But there is no means of prosecuting borrowers who take an extra book from the library in their pockets. There are model standing orders which may be adopted, which regulate the conduct of readers in reference libraries and reading rooms, but a book‐thief may plead that he meant only to borrow a book that has been found in his possession, and his offence will be treated merely as a technical breach of the rule that a book must be “charged” before it is taken from the library. When a clear case has been made, as in the notorious Walthamstow case, a foolishly sentimental Bench will refuse to help the libraries. We would urge the Library Association to give some consideration to the drafting of model standing orders which will give legal effect to the present “rules” under which libraries work, rules which the vicious may defy almost with impunity. The safety of the books in most libraries depends, actually, on public ignorance of the fact that most of our rules have no legal authority behind them.
IN order to be able to discriminate with certainty between butter and such margarine as is sold in England, it is necessary to carry out two or three elaborate and delicate…
Abstract
IN order to be able to discriminate with certainty between butter and such margarine as is sold in England, it is necessary to carry out two or three elaborate and delicate chemical processes. But there has always been a craving by the public for some simple method of determining the genuineness of butter by means of which the necessary trouble could be dispensed with. It has been suggested that such easy detection would be possible if all margarine bought and sold in England were to be manufactured with some distinctive colouring added—light‐blue, for instance—or were to contain a small amount of phenolphthalein, so that the addition of a drop of a solution of caustic potash to a suspected sample would cause it to become pink if it were margarine, while nothing would occur if it were genuine butter. These methods, which have been put forward seriously, will be found on consideration to be unnecessary, and, indeed, absurd.
In this chapter, I investigated how challenges (life events) are negotiated within families according to gender roles and their effect on marriage quality, life satisfaction, and…
Abstract
In this chapter, I investigated how challenges (life events) are negotiated within families according to gender roles and their effect on marriage quality, life satisfaction, and psychological resilience in a nonclinical sample of heterosexual couples (N=159), age 23–78 (M=45.4, SD=11.2), with children (n=127) or childfree (n=32). Specifically, I accounted for the individual’s ability to share “hurt feelings” and foster intimacy within the couple, thus strengthening resilience and improving life satisfaction and hypothesized that the impact of negative life events on both relationship quality and life satisfaction could depend on the resilience levels of each partner and their ratio according to gender roles. Results confirmed the hypothesis and showed significant gender differences in the impact of negative life events on relationship quality, life satisfaction, ability to share hurt feelings, fear of intimacy, and resilience levels. Moreover, the ratio of the partner’s individual resilience affected the dependent variables differently by gender, its level interacted with the age of the couple’s first child (range: 2–54, mean: 21.4, SD: 10.4) and strongly depended on the occupation of the parents.