Working PapersShmueli, Galit.,Jank, W.,Bapna, Ravi. "Measuring Consumer Surplus on eBay: An Empirical Study"Read Abstract >Close >Online auctions, consumer surplus, eBay, sniping

Working PapersShmueli, Galit . "Simulating Multivariate Syndromic Time Series and Outbreak Signatures"Read Abstract >Close >A serious challenge to research in the ¯eld of biosurveillance is the lack of available authentic syndromic data to researchers. This signi¯cantly limits the possibility of algorithm development and evaluation, and hiders the comparison of methods across di®erent groups of researchers. Since syndromic datasets are usually proprietary and tightly held by their owners, a robust simulation method for multivariate time series derived from syndromic data is required. This paper describes a method for simulating multivariate syndromic count data, in the form of daily counts from multiple syndromic series. The simulator can be used to generate multivariate syndromic data by specifying the requested statistical structure, and as a method to mimic an existing set of syndromic data for the purpose of creating a new dataset with the same statistical properties. The product of this study is both a software program that generates multivariate semi-authentic data, as well as a set of datasets that can serve as an initial repository for researchers. An additional component to the data simulator is an outbreak simulator that generates multivariate signatures of arti¯cial outbreaks of di®erent nature, and which can then be embedded within the simulated data to evaluate detection algorithm performance.

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