Joel A. Feldman

Learn More
The general restrictions on all economic primitives (i.e., (a) endowments, (b) preferences, and (c) asset return distributions) that yield the CAPM under the expected utility paradigm are provided. These results are then used to derive the class of restrictions on preferences and the distribution of asset returns alone that provides the CAPM. We also show(More)
In a series of ten papers (see the ßow chart at the end of ⁄I), of which this is the Þrst, we prove that the temperature zero renormalized perturbation expansions of a class of interacting many—fermion models in two space dimensions have nonzero radius of convergence. The models have ÒasymmetricÓ Fermi surfaces and short range interactions. One consequence(More)
Recent studies have indicated that odontoblasts and osteoblasts have unique regulatory mechanisms that control COL1A1 gene expression. We are currently examining the regulation of COL1A1 gene expression in odontoblasts and have produced transgenic mice containing various collagen promoter constructs fused to the indicator gene, chloramphenicol acetyl(More)
Tap water scald burns account for 7% to 17% of all childhood scald burns that require hospitalization. Often the burns are severe and disabling. Toddlers and preschool children are the most frequent victims. In 45% of the injuries, the unsupervised victim or peer turned on the tap water; in 28% the cause was abuse. Eighty percent of the homes tested had(More)
Regularity of the deformation of the Fermi surface under short-range interactions is established for all contributions to the RPA self–energy (it is proven in an accompanying paper that the RPA graphs are the least regular contributions to the self–energy). Roughly speaking, the graphs contributing to the RPA self– energy are those constructed by(More)
Recently there have been claims among drug users that some herbal drinks interfere with urinalysis for drugs of abuse and yield false positive results. Proof of such claims has yet to be shown. Screening for drugs of abuse is usually carried out using fluorescence polarization immunoassay (FPIA) or thin-layer chromatography (TLC). Fifty herbal samples which(More)