Bradley R. Larsen

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We introduce a simple and robust approach to address two key questions in empirical auction analysis: discriminating between models of entry and quantifying the revenue gains from improving auction design. The approach builds on Bulow and Klemperer (1996), connecting their theoretical results to empirical analysis. It applies in a broad range of information(More)
We have discovered distinctive red/gray chips in all the samples we have studied of the dust produced by the destruction of the World Trade Center. Examination of four of these samples, collected from separate sites, is reported in this paper. These red/gray chips show marked similarities in all four samples. One sample was collected by a Manhattan resident(More)
Presented is a fluorometric technique for the quantitative analysis of taurine in biological samples. The sample is homogenized, treated with picric acid, and passed through a mixed-bed, ion-exchange column. The eluant is lyophilized, reconstituted, and an aliquot derivatized with o-phthalaldehyde (OPA) prior to high performance liquid chromatography(More)
Bovine pineal glands were extracted according to the methods reported byBensinger et al. (1973) andCheesman andFariss (1970). Isobutanol soluble COH-inhibiting activity was further separated by chromatography on Sephadex G-15 and paper chromatography. With the Bensinger method, different active pineal fractions were obtained from Sephadex G-15 columns.(More)
Pineal glands from adult, male rats were incubated in oxygenated Krebs-Ringer buffer containing14C-cystine. After three hours the incubation media and pineal gland extracts were placed separately on Dowex AG W50-X-4 columns. In the elution volume where14C-labeled taurine is found a labeled peak was recovered. However, when subjected to one or two(More)
In order to determine the role of the pineal gland in mediating the effects of long-term light deprivation on prolactin (PRL) cell activity in a highly photosensitive species, PRL synthesis, storage and release were determined in both female and male Syrian hamsters that were either blind, blind and pinealectomized or left intact for 14 weeks. PRL release(More)
The handling of patients with dyspepsia by 102 general practitioners was investigated prospectively using a standardised application form for gastroscopy followed by a questionnaire to the practitioners. A mean of 5.3 indications were stated among 16 performed referral possibilities in 143 applications. Referral because of long-standing symptoms,(More)