Why do we reject the mean-variance model?

Article Abstract:

A two-stage method is used to analyze the static mean-variance portfolio model. The method determines if the link between asset supplies and returns is symmetric positive semi-definite. If so, then the model can be considered accurate. Application of the model to data on the asset holdings of German firms showed its failure to establish a semi-definite connection between returns and asset holdings.

Analysis, Capital assets pricing model, Capital asset pricing model

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No HMG-1 box signature

Article Abstract:

The existence of an HMG-1 box domain in TATA-binding proteins or when HMG has DNA-binding ability has not been borne out by research. Moreover, CCG1 protein has been found to have some genetic similarities to bacterial alpha-factor, although these similarities do not appear to have significant meaning.

Methods, Physiological aspects, Cloning, Hydroxymethylglutaryl coenzyme A reductases

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Reversing the effects of sun and time

Article Abstract:

Loss of collagen and elastin in the skin is brought about by either aging or prolonged exposure to the sun. This can be counteracted by the use of over-the-counter moisturizers or prescription skin creams which contain the active ingredient tretinoin.

Care and treatment, Usage, Evaluation, Skin, Skin care, Dermatologic agents, Tretinoin

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