منابع مشابه
On the existence of a cherry-picking sequence
Recently, the minimum number of reticulation events that is required to simultaneously embed a collection P of rooted binary phylogenetic trees into a so-called temporal network has been characterized in terms of cherry-picking sequences. Such a sequence is a particular ordering on the leaves of the trees in P. However, it is well-known that not all collections of phylogenetic trees have a cher...
متن کاملThe “When” and “Where” Dimensions of Cherry Picking
Due to the use of promotional pricing by supermarkets, there is considerable price variation across weeks within a store and across stores within a week. Consumers may therefore save on their groceries by (1) cherry picking over time (“when”) and (2) cherry picking across stores (“where”). The research focuses on three substantive research questions associated with cherry picking: (1) What vari...
متن کاملCherry-picking for complex data: robust structure discovery.
Complex data often arise as a superposition of data generated from several simpler models. The traditional strategy for such cases is to use mixture modelling, but it can be problematic, especially in higher dimensions. This paper considers an alternative approach, emphasizing data exploration and robustness to model misspecification. The strategy is applied to problems in regression, cluster a...
متن کاملCherry-picking in Labor Markets with Imperfect Information
We study a competitive labor market with imperfect information. In our basic model, the labor market consists of heterogeneous workers and ex ante identical firms who have imperfect information about workers’ productivities. Firms compete by posting wages each round to win the right to make job offers, and take turns to cherry-pick more productive workers. We also consider extensions of the mod...
متن کاملCherry-Picking and Asset Complexity: A Theory of Ratings Inflation
Many blame the recent financial market turmoil on malfeasance of ratings agencies, who had incentives to bias their ratings. But these incentives had existed for decades. Why did the ratings bias issue only recently emerge? We model asset issuers who can cherry-pick ratings – observe multiple ratings and disclose only a subset – before auctioning their assets. When assets are simple, agencies’ ...
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ژورنال
عنوان ژورنال: Clinical Neuroradiology
سال: 2020
ISSN: 1869-1439,1869-1447
DOI: 10.1007/s00062-020-00878-2