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Over 20 years of experience as an engineering executive, builder, and technology leader…
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Publications
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Is Oprah Contagious? Identifying Demand Spillovers in Online Networks
ICIS 2009 Honorable Mention; NET Institute Working Paper
We study the spread of exogenous demand shocks generated by book reviews featured on the Oprah Winfrey TV show and published in the New York Times through the online co-purchase recommendation network on Amazon.com. We leverage the co-purchase recommendation network on Amazon.com to determine how such exogenous events might affect the demand for books that were not explicitly mentioned in a review but are located “close” to reviewed books in a product network. Our results show that the demand…
We study the spread of exogenous demand shocks generated by book reviews featured on the Oprah Winfrey TV show and published in the New York Times through the online co-purchase recommendation network on Amazon.com. We leverage the co-purchase recommendation network on Amazon.com to determine how such exogenous events might affect the demand for books that were not explicitly mentioned in a review but are located “close” to reviewed books in a product network. Our results show that the demand shock diffuses to books that are up to three links away from the reviewed book. However, the magnitude of diffusion varies widely across books at the same network distance from reviewed products. We also describe how product characteristics, assortative mixing and network properties can explain this variation in the depth of contagion. We discuss the significance of these results and their implications for the design of networks of products as well as for optimizing digital marketing spillovers.
Other authorsSee publication -
Resolution enhancement in MRI
Magnetic resonance imaging
We consider the problem of Super Resolution Reconstruction (SRR) in MRI. Sub-pixel shifted MR Images were taken in several fields of view to reconstruct a high-resolution image. A novel algorithm is presented. The algorithm can be applied locally and guarantees perfect reconstruction in the absence of noise. Results that demonstrate resolution improvement are given for phantom studies (Mathematical Model) as well as for MRI studies of a phantom carried out with a GE clinical scanner. The method…
We consider the problem of Super Resolution Reconstruction (SRR) in MRI. Sub-pixel shifted MR Images were taken in several fields of view to reconstruct a high-resolution image. A novel algorithm is presented. The algorithm can be applied locally and guarantees perfect reconstruction in the absence of noise. Results that demonstrate resolution improvement are given for phantom studies (Mathematical Model) as well as for MRI studies of a phantom carried out with a GE clinical scanner. The method raises questions that are discussed in the last section of the paper. Open questions should be answered in order to apply this method for clinical purposes.
Other authors -
Assessing Value in an Online Network of Products
ICIS 2012 Best Paper Award; To appear in Journal of Marketing, May 2013
Traditionally, the value of a product is assessed according to its direct revenues. However, products do not exist in isolation but rather influence one another's sales. Such influence is especially evident in eCommerce environments, where products are presented as a large-scale product network. We present the first attempt to use a systematic approach to estimate products' true value to a firm in such settings. We separate a product’s value into its own intrinsic value, the value it receives…
Traditionally, the value of a product is assessed according to its direct revenues. However, products do not exist in isolation but rather influence one another's sales. Such influence is especially evident in eCommerce environments, where products are presented as a large-scale product network. We present the first attempt to use a systematic approach to estimate products' true value to a firm in such settings. We separate a product’s value into its own intrinsic value, the value it receives from the network, and the value it contributes to the network. Using data from the network of books on Amazon, we examine the relationship between revenue and the sources of value. We show that the value of low-sellers is underestimated when focusing on direct revenue, while the value of bestsellers is overestimated. We explore the sources of this discrepancy and discuss the implications for managing products in an environment of product networks.
Other authorsSee publication
Patents
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Knowledge Panel
Issued US US20170011102
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for providing knowledge panels. In one aspect, a method includes determining an entity that is referenced by a received search query. Content items relevant to the entity are identified. A set of knowledge modules is selected for presentation in a knowledge panel for the entity. The knowledge panel can be a portion of a search results page in which knowledge modules are presented. Data that causes…
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for providing knowledge panels. In one aspect, a method includes determining an entity that is referenced by a received search query. Content items relevant to the entity are identified. A set of knowledge modules is selected for presentation in a knowledge panel for the entity. The knowledge panel can be a portion of a search results page in which knowledge modules are presented. Data that causes the knowledge modules to be presented in the knowledge panel is provided to a user device.
Other inventorsSee patent -
Reconciling data
Issued USPTO
See patentMethods, systems, and apparatus, including computer program products, are described for reconciling data. In one implementation, a method includes generating co-occurrence scores indicating whether data in entries in a first source of data co-occur within documents in a plurality of documents with data in entries in a second source of data. The co-occurrence scores for a given entry in the first source of data are used to identify a plurality of candidate matching entries in the second source…
Methods, systems, and apparatus, including computer program products, are described for reconciling data. In one implementation, a method includes generating co-occurrence scores indicating whether data in entries in a first source of data co-occur within documents in a plurality of documents with data in entries in a second source of data. The co-occurrence scores for a given entry in the first source of data are used to identify a plurality of candidate matching entries in the second source of data for the given entry. Data in fields in the given entry are compared to that of one or more of the candidate matching entries to produce field similarity scores. The field similarity scores and the co-occurrence scores are used to determine a match for the given entry among the plurality of candidate matching entries.
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Configuration-management user interface employing searchable tags
Issued US 9,026,949
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