We propose a simplified approach to matching for causal inference that simultaneously optimizes both balance (between the treated and control groups) and matched sample size. This procedure resolves two widespread tensions in the use of this powerful and popular methodology. First, current practice is to run a matching method that maximizes one balance metric (such as a propensity score or average Mahalanobis distance), but then to check whether it succeeds with respect to a different balance metric for which it was not designed (such as differences in means or L1).
The Nova Scotia Good Health Directory is a directory of health practitioners, services and products in Nova Scotia.The printed directory is distributed throughout Nova Scotia year-round. We deliver to hundreds of locations including the offices of health professionals, pharmacies, supermarkets & local gathering places as well as to hundreds of MD's throughout the province. We print 30,000 copies of the directory in full colour, glossy paper in a convenient digest size.
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Aromatherapy is the art and science of using essential oils and other aromatic compounds to promote psychological and physiological healing. Aromatherapy is not new, in fact it has been around for thousands of years. Evidence of aromatherapy practices date back thousands of years to ancient Egypt, China and India. In Greek and Roman history and in the middle ages we find aromatherapy practices in numerous European countries. In the 1920's a French chemist, René-Maurice Gattefossé, coined the term aromatherapy and published the book of aromatherapy called: "Aromathérapie: Les Huiles Essentielles Hormones Végétales". Today we find aromatherapy and the use of essential oils in a variety of fields, from alternative health, to spa treatments and in the perfume industry.
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